src/modules/m_spanningtree.cpp

   1 /*   +------------------------------------+
   2  *   | Inspire Internet Relay Chat Daemon |
   3  *   +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 /* $ModDesc: Povides a spanning tree server link protocol */
  18
  19 #include "configreader.h"
  20 #include "users.h"
  21 #include "channels.h"
  22 #include "modules.h"
  23 #include "commands/cmd_whois.h"
  24 #include "commands/cmd_stats.h"
  25 #include "socket.h"
  26 #include "inspircd.h"
  27 #include "wildcard.h"
  28 #include "xline.h"
  29 #include "aes.h"
  30
  31 /** If you make a change which breaks the protocol, increment this.
  32  * If you  completely change the protocol, completely change the number.
  33  */
  34 const long ProtocolVersion = 1101;
  35
  36 /*
  37  * The server list in InspIRCd is maintained as two structures
  38  * which hold the data in different ways. Most of the time, we
  39  * want to very quicky obtain three pieces of information:
  40  *
  41  * (1) The information on a server
  42  * (2) The information on the server we must send data through
  43  *     to actually REACH the server we're after
  44  * (3) Potentially, the child/parent objects of this server
  45  *
  46  * The InspIRCd spanning protocol provides easy access to these
  47  * by storing the data firstly in a recursive structure, where
  48  * each item references its parent item, and a dynamic list
  49  * of child items, and another structure which stores the items
  50  * hashed, linearly. This means that if we want to find a server
  51  * by name quickly, we can look it up in the hash, avoiding
  52  * any O(n) lookups. If however, during a split or sync, we want
  53  * to apply an operation to a server, and any of its child objects
  54  * we can resort to recursion to walk the tree structure.
  55  * Any socket can have one of five states at any one time.
  56  * The LISTENER state indicates a socket which is listening
  57  * for connections. It cannot receive data itself, only incoming
  58  * sockets.
  59  * The CONNECTING state indicates an outbound socket which is
  60  * waiting to be writeable.
  61  * The WAIT_AUTH_1 state indicates the socket is outbound and
  62  * has successfully connected, but has not yet sent and received
  63  * SERVER strings.
  64  * The WAIT_AUTH_2 state indicates that the socket is inbound
  65  * (allocated by a LISTENER) but has not yet sent and received
  66  * SERVER strings.
  67  * The CONNECTED state represents a fully authorized, fully
  68  * connected server.
  69  */
  70 enum ServerState { LISTENER, CONNECTING, WAIT_AUTH_1, WAIT_AUTH_2, CONNECTED };
  71
  72 /* Foward declarations */
  73 class TreeServer;
  74 class TreeSocket;
  75 class Link;
  76 class ModuleSpanningTree;
  77
  78 /* This hash_map holds the hash equivalent of the server
  79  * tree, used for rapid linear lookups.
  80  */
  81 typedef nspace::hash_map<std::string, TreeServer*, nspace::hash<string>, irc::StrHashComp> server_hash;
  82
  83 /** Contains helper functions and variables for this module,
  84  * and keeps them out of the global namespace
  85  */
  86 class SpanningTreeUtilities
  87 {
  88  private:
  89         /** Creator server
  90          */
  91         InspIRCd* ServerInstance;
  92  public:
  93         /** Creator module
  94          */
  95         ModuleSpanningTree* Creator;
  96         /** Flatten links and /MAP for non-opers
  97          */
  98         bool FlatLinks;
  99         /** Hide U-Lined servers in /MAP and /LINKS
 100          */
 101         bool HideULines;
 102         /** Announce TS changes to channels on merge
 103          */
 104         bool AnnounceTSChange;
 105         /** Socket bindings for listening sockets
 106          */
 107         std::vector<TreeSocket*> Bindings;
 108         /** This variable represents the root of the server tree
 109          */
 110         TreeServer *TreeRoot;
 111         /** IPs allowed to link to us
 112          */
 113         std::vector<std::string> ValidIPs;
 114         /** Hash of currently connected servers by name
 115          */
 116         server_hash serverlist;
 117         /** Holds the data from the <link> tags in the conf
 118          */
 119         std::vector<Link> LinkBlocks;
 120
 121         /** Initialise utility class
 122          */
 123         SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* Creator);
 124         /** Destroy class and free listeners etc
 125          */
 126         ~SpanningTreeUtilities();
 127         /** Send a message from this server to one other local or remote
 128          */
 129         bool DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target);
 130         /** Send a message from this server to all but one other, local or remote
 131          */
 132         bool DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit);
 133         /** Send a message from this server to all but one other, local or remote
 134          */
 135         bool DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit);
 136         /** Send a message from this server to all others
 137          */
 138         bool DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params);
 139         /** Send a message from this server to all others
 140          */
 141         bool DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params);
 142         /** Send a message from this server to all others, without doing any processing on the command (e.g. send it as-is with colons and all)
 143          */
 144         bool DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params);
 145         /** Read the spanningtree module's tags from the config file
 146          */
 147         void ReadConfiguration(bool rebind);
 148         /** Add a server to the server list for GetListOfServersForChannel
 149          */
 150         void AddThisServer(TreeServer* server, std::deque<TreeServer*> &list);
 151         /** Compile a list of servers which contain members of channel c
 152          */
 153         void GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list);
 154         /** Find a server by name
 155          */
 156         TreeServer* FindServer(std::string ServerName);
 157         /** Find a route to a server by name
 158          */
 159         TreeServer* BestRouteTo(std::string ServerName);
 160         /** Find a server by glob mask
 161          */
 162         TreeServer* FindServerMask(std::string ServerName);
 163         /** Returns true if this is a server name we recognise
 164          */
 165         bool IsServer(std::string ServerName);
 166         /** Attempt to connect to the failover link of link x
 167          */
 168         void DoFailOver(Link* x);
 169         /** Find a link tag from a server name
 170          */
 171         Link* FindLink(const std::string& name);
 172 };
 173
 174
 175 /** Each server in the tree is represented by one class of
 176  * type TreeServer. A locally connected TreeServer can
 177  * have a class of type TreeSocket associated with it, for
 178  * remote servers, the TreeSocket entry will be NULL.
 179  * Each server also maintains a pointer to its parent
 180  * (NULL if this server is ours, at the top of the tree)
 181  * and a pointer to its "Route" (see the comments in the
 182  * constructors below), and also a dynamic list of pointers
 183  * to its children which can be iterated recursively
 184  * if required. Creating or deleting objects of type
 185  i* TreeServer automatically maintains the hash_map of
 186  * TreeServer items, deleting and inserting them as they
 187  * are created and destroyed.
 188  */
 189 class TreeServer : public classbase
 190 {
 191         InspIRCd* ServerInstance;               /* Creator */
 192         SpanningTreeUtilities* Utils;           /* Utility class */
 193         TreeServer* Parent;                     /* Parent entry */
 194         TreeServer* Route;                      /* Route entry */
 195         std::vector<TreeServer*> Children;      /* List of child objects */
 196         irc::string ServerName;                 /* Server's name */
 197         std::string ServerDesc;                 /* Server's description */
 198         std::string VersionString;              /* Version string or empty string */
 199         int UserCount;                          /* Not used in this version */
 200         int OperCount;                          /* Not used in this version */
 201         TreeSocket* Socket;                     /* For directly connected servers this points at the socket object */
 202         time_t NextPing;                        /* After this time, the server should be PINGed*/
 203         bool LastPingWasGood;                   /* True if the server responded to the last PING with a PONG */
 204
 205  public:
 206
 207         /** We don't use this constructor. Its a dummy, and won't cause any insertion
 208          * of the TreeServer into the hash_map. See below for the two we DO use.
 209          */
 210         TreeServer(SpanningTreeUtilities* Utils, InspIRCd* Instance) : ServerInstance(Instance)
 211         {
 212                 Parent = NULL;
 213                 ServerName = "";
 214                 ServerDesc = "";
 215                 VersionString = "";
 216                 UserCount = OperCount = 0;
 217                 VersionString = ServerInstance->GetVersionString();
 218         }
 219
 220         /** We use this constructor only to create the 'root' item, Utils->TreeRoot, which
 221          * represents our own server. Therefore, it has no route, no parent, and
 222          * no socket associated with it. Its version string is our own local version.
 223          */
 224         TreeServer(SpanningTreeUtilities* Utils, InspIRCd* Instance, std::string Name, std::string Desc) : ServerInstance(Instance), ServerName(Name.c_str()), ServerDesc(Desc)
 225         {
 226                 Parent = NULL;
 227                 VersionString = "";
 228                 UserCount = OperCount = 0;
 229                 VersionString = ServerInstance->GetVersionString();
 230                 Route = NULL;
 231                 Socket = NULL; /* Fix by brain */
 232                 AddHashEntry();
 233         }
 234
 235         /** When we create a new server, we call this constructor to initialize it.
 236          * This constructor initializes the server's Route and Parent, and sets up
 237          * its ping counters so that it will be pinged one minute from now.
 238          */
 239         TreeServer(SpanningTreeUtilities* Utils, InspIRCd* Instance, std::string Name, std::string Desc, TreeServer* Above, TreeSocket* Sock)
 240                 : ServerInstance(Instance), Parent(Above), ServerName(Name.c_str()), ServerDesc(Desc), Socket(Sock)
 241         {
 242                 VersionString = "";
 243                 UserCount = OperCount = 0;
 244                 this->SetNextPingTime(time(NULL) + 60);
 245                 this->SetPingFlag();
 246
 247                 /* find the 'route' for this server (e.g. the one directly connected
 248                  * to the local server, which we can use to reach it)
 249                  *
 250                  * In the following example, consider we have just added a TreeServer
 251                  * class for server G on our network, of which we are server A.
 252                  * To route traffic to G (marked with a *) we must send the data to
 253                  * B (marked with a +) so this algorithm initializes the 'Route'
 254                  * value to point at whichever server traffic must be routed through
 255                  * to get here. If we were to try this algorithm with server B,
 256                  * the Route pointer would point at its own object ('this').
 257                  *
 258                  *              A
 259                  *             / \
 260                  *          + B   C
 261                  *           / \   \
 262                  *          D   E   F
 263                  *         /         \
 264                  *      * G           H
 265                  *
 266                  * We only run this algorithm when a server is created, as
 267                  * the routes remain constant while ever the server exists, and
 268                  * do not need to be re-calculated.
 269                  */
 270
 271                 Route = Above;
 272                 if (Route == Utils->TreeRoot)
 273                 {
 274                         Route = this;
 275                 }
 276                 else
 277                 {
 278                         while (this->Route->GetParent() != Utils->TreeRoot)
 279                         {
 280                                 this->Route = Route->GetParent();
 281                         }
 282                 }
 283
 284                 /* Because recursive code is slow and takes a lot of resources,
 285                  * we store two representations of the server tree. The first
 286                  * is a recursive structure where each server references its
 287                  * children and its parent, which is used for netbursts and
 288                  * netsplits to dump the whole dataset to the other server,
 289                  * and the second is used for very fast lookups when routing
 290                  * messages and is instead a hash_map, where each item can
 291                  * be referenced by its server name. The AddHashEntry()
 292                  * call below automatically inserts each TreeServer class
 293                  * into the hash_map as it is created. There is a similar
 294                  * maintainance call in the destructor to tidy up deleted
 295                  * servers.
 296                  */
 297
 298                 this->AddHashEntry();
 299         }
 300
 301         int QuitUsers(const std::string &reason)
 302         {
 303                 ServerInstance->Log(DEBUG,"Removing all users from server %s",this->ServerName.c_str());
 304                 const char* reason_s = reason.c_str();
 305                 std::vector<userrec*> time_to_die;
 306                 for (user_hash::iterator n = ServerInstance->clientlist.begin(); n != ServerInstance->clientlist.end(); n++)
 307                 {
 308                         if (!strcmp(n->second->server, this->ServerName.c_str()))
 309                         {
 310                                 time_to_die.push_back(n->second);
 311                         }
 312                 }
 313                 for (std::vector<userrec*>::iterator n = time_to_die.begin(); n != time_to_die.end(); n++)
 314                 {
 315                         userrec* a = (userrec*)*n;
 316                         ServerInstance->Log(DEBUG,"Kill %s fd=%d",a->nick,a->GetFd());
 317                         if (!IS_LOCAL(a))
 318                                 userrec::QuitUser(ServerInstance,a,reason_s);
 319                 }
 320                 return time_to_die.size();
 321         }
 322
 323         /** This method is used to add the structure to the
 324          * hash_map for linear searches. It is only called
 325          * by the constructors.
 326          */
 327         void AddHashEntry()
 328         {
 329                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 330                 if (iter == Utils->serverlist.end())
 331                         Utils->serverlist[this->ServerName.c_str()] = this;
 332         }
 333
 334         /** This method removes the reference to this object
 335          * from the hash_map which is used for linear searches.
 336          * It is only called by the default destructor.
 337          */
 338         void DelHashEntry()
 339         {
 340                 server_hash::iterator iter = Utils->serverlist.find(this->ServerName.c_str());
 341                 if (iter != Utils->serverlist.end())
 342                         Utils->serverlist.erase(iter);
 343         }
 344
 345         /** These accessors etc should be pretty self-
 346          * explanitory.
 347          */
 348         TreeServer* GetRoute()
 349         {
 350                 return Route;
 351         }
 352
 353         std::string GetName()
 354         {
 355                 return ServerName.c_str();
 356         }
 357
 358         std::string GetDesc()
 359         {
 360                 return ServerDesc;
 361         }
 362
 363         std::string GetVersion()
 364         {
 365                 return VersionString;
 366         }
 367
 368         void SetNextPingTime(time_t t)
 369         {
 370                 this->NextPing = t;
 371                 LastPingWasGood = false;
 372         }
 373
 374         time_t NextPingTime()
 375         {
 376                 return NextPing;
 377         }
 378
 379         bool AnsweredLastPing()
 380         {
 381                 return LastPingWasGood;
 382         }
 383
 384         void SetPingFlag()
 385         {
 386                 LastPingWasGood = true;
 387         }
 388
 389         int GetUserCount()
 390         {
 391                 return UserCount;
 392         }
 393
 394         void AddUserCount()
 395         {
 396                 UserCount++;
 397         }
 398
 399         void DelUserCount()
 400         {
 401                 UserCount--;
 402         }
 403
 404         int GetOperCount()
 405         {
 406                 return OperCount;
 407         }
 408
 409         TreeSocket* GetSocket()
 410         {
 411                 return Socket;
 412         }
 413
 414         TreeServer* GetParent()
 415         {
 416                 return Parent;
 417         }
 418
 419         void SetVersion(std::string Version)
 420         {
 421                 VersionString = Version;
 422         }
 423
 424         unsigned int ChildCount()
 425         {
 426                 return Children.size();
 427         }
 428
 429         TreeServer* GetChild(unsigned int n)
 430         {
 431                 if (n < Children.size())
 432                 {
 433                         /* Make sure they  cant request
 434                          * an out-of-range object. After
 435                          * all we know what these programmer
 436                          * types are like *grin*.
 437                          */
 438                         return Children[n];
 439                 }
 440                 else
 441                 {
 442                         return NULL;
 443                 }
 444         }
 445
 446         void AddChild(TreeServer* Child)
 447         {
 448                 Children.push_back(Child);
 449         }
 450
 451         bool DelChild(TreeServer* Child)
 452         {
 453                 for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 454                 {
 455                         if (*a == Child)
 456                         {
 457                                 Children.erase(a);
 458                                 return true;
 459                         }
 460                 }
 461                 return false;
 462         }
 463
 464         /** Removes child nodes of this node, and of that node, etc etc.
 465          * This is used during netsplits to automatically tidy up the
 466          * server tree. It is slow, we don't use it for much else.
 467          */
 468         bool Tidy()
 469         {
 470                 bool stillchildren = true;
 471                 while (stillchildren)
 472                 {
 473                         stillchildren = false;
 474                         for (std::vector<TreeServer*>::iterator a = Children.begin(); a < Children.end(); a++)
 475                         {
 476                                 TreeServer* s = (TreeServer*)*a;
 477                                 s->Tidy();
 478                                 Children.erase(a);
 479                                 DELETE(s);
 480                                 stillchildren = true;
 481                                 break;
 482                         }
 483                 }
 484                 return true;
 485         }
 486
 487         ~TreeServer()
 488         {
 489                 /* We'd better tidy up after ourselves, eh? */
 490                 this->DelHashEntry();
 491         }
 492 };
 493
 494 /** The Link class might as well be a struct,
 495  * but this is C++ and we don't believe in structs (!).
 496  * It holds the entire information of one <link>
 497  * tag from the main config file. We maintain a list
 498  * of them, and populate the list on rehash/load.
 499  */
 500 class Link : public classbase
 501 {
 502  public:
 503         irc::string Name;
 504         std::string IPAddr;
 505         int Port;
 506         std::string SendPass;
 507         std::string RecvPass;
 508         unsigned long AutoConnect;
 509         time_t NextConnectTime;
 510         std::string EncryptionKey;
 511         bool HiddenFromStats;
 512         irc::string FailOver;
 513 };
 514
 515 /** Yay for fast searches!
 516  * This is hundreds of times faster than recursion
 517  * or even scanning a linked list, especially when
 518  * there are more than a few servers to deal with.
 519  * (read as: lots).
 520  */
 521 TreeServer* SpanningTreeUtilities::FindServer(std::string ServerName)
 522 {
 523         server_hash::iterator iter;
 524         iter = serverlist.find(ServerName.c_str());
 525         if (iter != serverlist.end())
 526         {
 527                 return iter->second;
 528         }
 529         else
 530         {
 531                 return NULL;
 532         }
 533 }
 534
 535 /** Returns the locally connected server we must route a
 536  * message through to reach server 'ServerName'. This
 537  * only applies to one-to-one and not one-to-many routing.
 538  * See the comments for the constructor of TreeServer
 539  * for more details.
 540  */
 541 TreeServer* SpanningTreeUtilities::BestRouteTo(std::string ServerName)
 542 {
 543         if (ServerName.c_str() == TreeRoot->GetName())
 544                 return NULL;
 545         TreeServer* Found = FindServer(ServerName);
 546         if (Found)
 547         {
 548                 return Found->GetRoute();
 549         }
 550         else
 551         {
 552                 return NULL;
 553         }
 554 }
 555
 556 /** Find the first server matching a given glob mask.
 557  * Theres no find-using-glob method of hash_map [awwww :-(]
 558  * so instead, we iterate over the list using an iterator
 559  * and match each one until we get a hit. Yes its slow,
 560  * deal with it.
 561  */
 562 TreeServer* SpanningTreeUtilities::FindServerMask(std::string ServerName)
 563 {
 564         for (server_hash::iterator i = serverlist.begin(); i != serverlist.end(); i++)
 565         {
 566                 if (match(i->first.c_str(),ServerName.c_str()))
 567                         return i->second;
 568         }
 569         return NULL;
 570 }
 571
 572 /* A convenient wrapper that returns true if a server exists */
 573 bool SpanningTreeUtilities::IsServer(std::string ServerName)
 574 {
 575         return (FindServer(ServerName) != NULL);
 576 }
 577
 578
 579 /** Handle /RCONNECT
 580  */
 581 class cmd_rconnect : public command_t
 582 {
 583         Module* Creator;
 584         SpanningTreeUtilities* Utils;
 585  public:
 586         cmd_rconnect (InspIRCd* Instance, Module* Callback, SpanningTreeUtilities* Util) : command_t(Instance, "RCONNECT", 'o', 2), Creator(Callback), Utils(Util)
 587         {
 588                 this->source = "m_spanningtree.so";
 589                 syntax = "<remote-server-mask> <servermask>";
 590         }
 591
 592         CmdResult Handle (const char** parameters, int pcnt, userrec *user)
 593         {
 594                 user->WriteServ("NOTICE %s :*** RCONNECT: Sending remote connect to \002%s\002 to connect server \002%s\002.",user->nick,parameters[0],parameters[1]);
 595                 /* Is this aimed at our server? */
 596                 if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameters[0]))
 597                 {
 598                         /* Yes, initiate the given connect */
 599                         ServerInstance->SNO->WriteToSnoMask('l',"Remote CONNECT from %s matching \002%s\002, connecting server \002%s\002",user->nick,parameters[0],parameters[1]);
 600                         const char* para[1];
 601                         para[0] = parameters[1];
 602                         std::string original_command = std::string("CONNECT ") + parameters[1];
 603                         Creator->OnPreCommand("CONNECT", para, 1, user, true, original_command);
 604
 605                         return CMD_SUCCESS;
 606                 }
 607
 608                 return CMD_FAILURE;
 609         }
 610 };
 611
 612
 613
 614 /** Every SERVER connection inbound or outbound is represented by
 615  * an object of type TreeSocket.
 616  * TreeSockets, being inherited from InspSocket, can be tied into
 617  * the core socket engine, and we cn therefore receive activity events
 618  * for them, just like activex objects on speed. (yes really, that
 619  * is a technical term!) Each of these which relates to a locally
 620  * connected server is assocated with it, by hooking it onto a
 621  * TreeSocket class using its constructor. In this way, we can
 622  * maintain a list of servers, some of which are directly connected,
 623  * some of which are not.
 624  */
 625 class TreeSocket : public InspSocket
 626 {
 627         SpanningTreeUtilities* Utils;
 628         std::string myhost;
 629         std::string in_buffer;
 630         ServerState LinkState;
 631         std::string InboundServerName;
 632         std::string InboundDescription;
 633         int num_lost_users;
 634         int num_lost_servers;
 635         time_t NextPing;
 636         bool LastPingWasGood;
 637         bool bursting;
 638         AES* ctx_in;
 639         AES* ctx_out;
 640         unsigned int keylength;
 641         std::string ModuleList;
 642         std::map<std::string,std::string> CapKeys;
 643
 644  public:
 645
 646         /** Because most of the I/O gubbins are encapsulated within
 647          * InspSocket, we just call the superclass constructor for
 648          * most of the action, and append a few of our own values
 649          * to it.
 650          */
 651         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime)
 652                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 653         {
 654                 myhost = host;
 655                 this->LinkState = LISTENER;
 656                 this->ctx_in = NULL;
 657                 this->ctx_out = NULL;
 658         }
 659
 660         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, std::string host, int port, bool listening, unsigned long maxtime, std::string ServerName)
 661                 : InspSocket(SI, host, port, listening, maxtime), Utils(Util)
 662         {
 663                 myhost = ServerName;
 664                 this->LinkState = CONNECTING;
 665                 this->ctx_in = NULL;
 666                 this->ctx_out = NULL;
 667         }
 668
 669         /** When a listening socket gives us a new file descriptor,
 670          * we must associate it with a socket without creating a new
 671          * connection. This constructor is used for this purpose.
 672          */
 673         TreeSocket(SpanningTreeUtilities* Util, InspIRCd* SI, int newfd, char* ip)
 674                 : InspSocket(SI, newfd, ip), Utils(Util)
 675         {
 676                 this->LinkState = WAIT_AUTH_1;
 677                 this->ctx_in = NULL;
 678                 this->ctx_out = NULL;
 679                 this->SendCapabilities();
 680         }
 681
 682         ~TreeSocket()
 683         {
 684                 if (ctx_in)
 685                         DELETE(ctx_in);
 686                 if (ctx_out)
 687                         DELETE(ctx_out);
 688         }
 689
 690         void InitAES(std::string key,std::string SName)
 691         {
 692                 if (key == "")
 693                         return;
 694
 695                 ctx_in = new AES();
 696                 ctx_out = new AES();
 697                 Instance->Log(DEBUG,"Initialized AES key %s",key.c_str());
 698                 // key must be 16, 24, 32 etc bytes (multiple of 8)
 699                 keylength = key.length();
 700                 if (!(keylength == 16 || keylength == 24 || keylength == 32))
 701                 {
 702                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Key length for encryptionkey is not 16, 24 or 32 bytes in length!");
 703                         Instance->Log(DEBUG,"Key length not 16, 24 or 32 characters!");
 704                 }
 705                 else
 706                 {
 707                         if (this->GetState() != I_ERROR)
 708                         {
 709                                 this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Initialized %d bit encryption to server %s",keylength*8,SName.c_str());
 710                                 ctx_in->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 711                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 712                                 ctx_out->MakeKey(key.c_str(), "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 713                                         \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", keylength, keylength);
 714                         }
 715                 }
 716         }
 717
 718         /** When an outbound connection finishes connecting, we receive
 719          * this event, and must send our SERVER string to the other
 720          * side. If the other side is happy, as outlined in the server
 721          * to server docs on the inspircd.org site, the other side
 722          * will then send back its own server string.
 723          */
 724         virtual bool OnConnected()
 725         {
 726                 if (this->LinkState == CONNECTING)
 727                 {
 728                         /* we do not need to change state here. */
 729                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
 730                         {
 731                                 if (x->Name == this->myhost)
 732                                 {
 733                                         this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] started.");
 734                                         this->SendCapabilities();
 735                                         if (x->EncryptionKey != "")
 736                                         {
 737                                                 if (!(x->EncryptionKey.length() == 16 || x->EncryptionKey.length() == 24 || x->EncryptionKey.length() == 32))
 738                                                 {
 739                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your encryption key is NOT 16, 24 or 32 characters in length, encryption will \2NOT\2 be enabled.");
 740                                                 }
 741                                                 else
 742                                                 {
 743                                                         this->WriteLine(std::string("AES ")+this->Instance->Config->ServerName);
 744                                                         this->InitAES(x->EncryptionKey,x->Name.c_str());
 745                                                 }
 746                                         }
 747                                         /* found who we're supposed to be connecting to, send the neccessary gubbins. */
 748                                         this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
 749                                         return true;
 750                                 }
 751                         }
 752                 }
 753                 /* There is a (remote) chance that between the /CONNECT and the connection
 754                  * being accepted, some muppet has removed the <link> block and rehashed.
 755                  * If that happens the connection hangs here until it's closed. Unlikely
 756                  * and rather harmless.
 757                  */
 758                 this->Instance->SNO->WriteToSnoMask('l',"Connection to \2"+myhost+"\2 lost link tag(!)");
 759                 return true;
 760         }
 761
 762         virtual void OnError(InspSocketError e)
 763         {
 764                 /* We don't handle this method, because all our
 765                  * dirty work is done in OnClose() (see below)
 766                  * which is still called on error conditions too.
 767                  */
 768                 if (e == I_ERR_CONNECT)
 769                 {
 770                         this->Instance->SNO->WriteToSnoMask('l',"Connection failed: Connection to \002"+myhost+"\002 refused");
 771                         Link* MyLink = Utils->FindLink(myhost);
 772                         if (MyLink)
 773                                 Utils->DoFailOver(MyLink);
 774                 }
 775         }
 776
 777         virtual int OnDisconnect()
 778         {
 779                 /* For the same reason as above, we don't
 780                  * handle OnDisconnect()
 781                  */
 782                 return true;
 783         }
 784
 785         /** Recursively send the server tree with distances as hops.
 786          * This is used during network burst to inform the other server
 787          * (and any of ITS servers too) of what servers we know about.
 788          * If at any point any of these servers already exist on the other
 789          * end, our connection may be terminated. The hopcounts given
 790          * by this function are relative, this doesn't matter so long as
 791          * they are all >1, as all the remote servers re-calculate them
 792          * to be relative too, with themselves as hop 0.
 793          */
 794         void SendServers(TreeServer* Current, TreeServer* s, int hops)
 795         {
 796                 char command[1024];
 797                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
 798                 {
 799                         TreeServer* recursive_server = Current->GetChild(q);
 800                         if (recursive_server != s)
 801                         {
 802                                 snprintf(command,1024,":%s SERVER %s * %d :%s",Current->GetName().c_str(),recursive_server->GetName().c_str(),hops,recursive_server->GetDesc().c_str());
 803                                 this->WriteLine(command);
 804                                 this->WriteLine(":"+recursive_server->GetName()+" VERSION :"+recursive_server->GetVersion());
 805                                 /* down to next level */
 806                                 this->SendServers(recursive_server, s, hops+1);
 807                         }
 808                 }
 809         }
 810
 811         std::string MyCapabilities()
 812         {
 813                 std::vector<std::string> modlist;
 814                 std::string capabilities = "";
 815
 816                 for (int i = 0; i <= this->Instance->GetModuleCount(); i++)
 817                 {
 818                         if (this->Instance->modules[i]->GetVersion().Flags & VF_COMMON)
 819                                 modlist.push_back(this->Instance->Config->module_names[i]);
 820                 }
 821                 sort(modlist.begin(),modlist.end());
 822                 for (unsigned int i = 0; i < modlist.size(); i++)
 823                 {
 824                         if (i)
 825                                 capabilities = capabilities + ",";
 826                         capabilities = capabilities + modlist[i];
 827                 }
 828                 return capabilities;
 829         }
 830
 831         void SendCapabilities()
 832         {
 833                 irc::commasepstream modulelist(MyCapabilities());
 834
 835                 this->WriteLine("CAPAB START");
 836
 837                 /* Send module names, split at 509 length */
 838                 std::string item = "*";
 839                 std::string line = "CAPAB MODULES ";
 840                 while ((item = modulelist.GetToken()) != "")
 841                 {
 842                         if (line.length() + item.length() + 1 > 509)
 843                         {
 844                                 this->WriteLine(line);
 845                                 line = "CAPAB MODULES ";
 846                         }
 847
 848                         if (line != "CAPAB MODULES ")
 849                                 line.append(",");
 850
 851                         line.append(item);
 852                 }
 853                 if (line != "CAPAB MODULES ")
 854                         this->WriteLine(line);
 855
 856                 int ip6 = 0;
 857                 int ip6support = 0;
 858 #ifdef IPV6
 859                 ip6 = 1;
 860 #endif
 861 #ifdef SUPPORT_IP6LINKS
 862                 ip6support = 1;
 863 #endif
 864                 this->WriteLine("CAPAB CAPABILITIES :NICKMAX="+ConvToStr(NICKMAX)+" HALFOP="+ConvToStr(this->Instance->Config->AllowHalfop)+" CHANMAX="+ConvToStr(CHANMAX)+" MAXMODES="+ConvToStr(MAXMODES)+" IDENTMAX="+ConvToStr(IDENTMAX)+" MAXQUIT="+ConvToStr(MAXQUIT)+" MAXTOPIC="+ConvToStr(MAXTOPIC)+" MAXKICK="+ConvToStr(MAXKICK)+" MAXGECOS="+ConvToStr(MAXGECOS)+" MAXAWAY="+ConvToStr(MAXAWAY)+" IP6NATIVE="+ConvToStr(ip6)+" IP6SUPPORT="+ConvToStr(ip6support)+" PROTOCOL="+ConvToStr(ProtocolVersion));
 865
 866                 this->WriteLine("CAPAB END");
 867         }
 868
 869         /* Check a comma seperated list for an item */
 870         bool HasItem(const std::string &list, const std::string &item)
 871         {
 872                 irc::commasepstream seplist(list);
 873
 874                 std::string item2 = "*";
 875                 while ((item2 = seplist.GetToken()) != "")
 876                 {
 877                         if (item2 == item)
 878                                 return true;
 879                 }
 880
 881                 return false;
 882         }
 883
 884         /* Isolate and return the elements that are different between two comma seperated lists */
 885         std::string ListDifference(const std::string &one, const std::string &two)
 886         {
 887                 irc::commasepstream list_one(one);
 888                 std::string item = "*";
 889                 std::string result = "";
 890                 while ((item = list_one.GetToken()) != "")
 891                 {
 892                         if (!HasItem(two, item))
 893                         {
 894                                 result.append(" ");
 895                                 result.append(item);
 896                         }
 897                 }
 898                 return result;
 899         }
 900
 901         bool Capab(std::deque<std::string> params)
 902         {
 903                 if (params.size() < 1)
 904                 {
 905                         this->WriteLine("ERROR :Invalid number of parameters for CAPAB - Mismatched version");
 906                         return false;
 907                 }
 908
 909                 if (params[0] == "START")
 910                 {
 911                         this->ModuleList = "";
 912                         this->CapKeys.clear();
 913                 }
 914                 else if (params[0] == "END")
 915                 {
 916                         std::string reason = "";
 917                         int ip6support = 0;
 918 #ifdef SUPPORT_IP6LINKS
 919                         ip6support = 1;
 920 #endif
 921                         /* Compare ModuleList and check CapKeys...
 922                          * Maybe this could be tidier? -- Brain
 923                          */
 924                         if ((this->ModuleList != this->MyCapabilities()) && (this->ModuleList.length()))
 925                         {
 926                                 std::string diff = ListDifference(this->ModuleList, this->MyCapabilities());
 927                                 if (!diff.length())
 928                                 {
 929                                         diff = "your server:" + ListDifference(this->MyCapabilities(), this->ModuleList);
 930                                 }
 931                                 else
 932                                 {
 933                                         diff = "this server:" + diff;
 934                                 }
 935                                 if (diff.length() == 12)
 936                                         reason = "Module list in CAPAB is not alphabetically ordered, cannot compare lists.";
 937                                 else
 938                                         reason = "Modules loaded on these servers are not correctly matched, these modules are not loaded on " + diff;
 939                         }
 940
 941                         if (((this->CapKeys.find("IP6SUPPORT") == this->CapKeys.end()) && (ip6support)) || ((this->CapKeys.find("IP6SUPPORT") != this->CapKeys.end()) && (this->CapKeys.find("IP6SUPPORT")->second != ConvToStr(ip6support))))
 942                                 reason = "We don't both support linking to IPV6 servers";
 943
 944                         if (((this->CapKeys.find("IP6NATIVE") != this->CapKeys.end()) && (this->CapKeys.find("IP6NATIVE")->second == "1")) && (!ip6support))
 945                                 reason = "The remote server is IPV6 native, and we don't support linking to IPV6 servers";
 946
 947                         if (((this->CapKeys.find("NICKMAX") == this->CapKeys.end()) || ((this->CapKeys.find("NICKMAX") != this->CapKeys.end()) && (this->CapKeys.find("NICKMAX")->second != ConvToStr(NICKMAX)))))
 948                                 reason = "Maximum nickname lengths differ or remote nickname length not specified";
 949
 950                         if (((this->CapKeys.find("PROTOCOL") == this->CapKeys.end()) || ((this->CapKeys.find("PROTOCOL") != this->CapKeys.end()) && (this->CapKeys.find("PROTOCOL")->second != ConvToStr(ProtocolVersion)))))
 951                         {
 952                                 if (this->CapKeys.find("PROTOCOL") != this->CapKeys.end())
 953                                 {
 954                                         reason = "Mismatched protocol versions "+this->CapKeys.find("PROTOCOL")->second+" and "+ConvToStr(ProtocolVersion);
 955                                 }
 956                                 else
 957                                 {
 958                                         reason = "Protocol version not specified";
 959                                 }
 960                         }
 961
 962                         if (((this->CapKeys.find("HALFOP") == this->CapKeys.end()) && (Instance->Config->AllowHalfop)) || ((this->CapKeys.find("HALFOP") != this->CapKeys.end()) && (this->CapKeys.find("HALFOP")->second != ConvToStr(Instance->Config->AllowHalfop))))
 963                                 reason = "We don't both have halfop support enabled/disabled identically";
 964
 965                         if (((this->CapKeys.find("IDENTMAX") == this->CapKeys.end()) || ((this->CapKeys.find("IDENTMAX") != this->CapKeys.end()) && (this->CapKeys.find("IDENTMAX")->second != ConvToStr(IDENTMAX)))))
 966                                 reason = "Maximum ident lengths differ or remote ident length not specified";
 967
 968                         if (((this->CapKeys.find("CHANMAX") == this->CapKeys.end()) || ((this->CapKeys.find("CHANMAX") != this->CapKeys.end()) && (this->CapKeys.find("CHANMAX")->second != ConvToStr(CHANMAX)))))
 969                                 reason = "Maximum channel lengths differ or remote channel length not specified";
 970
 971                         if (((this->CapKeys.find("MAXMODES") == this->CapKeys.end()) || ((this->CapKeys.find("MAXMODES") != this->CapKeys.end()) && (this->CapKeys.find("MAXMODES")->second != ConvToStr(MAXMODES)))))
 972                                 reason = "Maximum modes per line differ or remote modes per line not specified";
 973
 974                         if (((this->CapKeys.find("MAXQUIT") == this->CapKeys.end()) || ((this->CapKeys.find("MAXQUIT") != this->CapKeys.end()) && (this->CapKeys.find("MAXQUIT")->second != ConvToStr(MAXQUIT)))))
 975                                 reason = "Maximum quit lengths differ or remote quit length not specified";
 976
 977                         if (((this->CapKeys.find("MAXTOPIC") == this->CapKeys.end()) || ((this->CapKeys.find("MAXTOPIC") != this->CapKeys.end()) && (this->CapKeys.find("MAXTOPIC")->second != ConvToStr(MAXTOPIC)))))
 978                                 reason = "Maximum topic lengths differ or remote topic length not specified";
 979
 980                         if (((this->CapKeys.find("MAXKICK") == this->CapKeys.end()) || ((this->CapKeys.find("MAXKICK") != this->CapKeys.end()) && (this->CapKeys.find("MAXKICK")->second != ConvToStr(MAXKICK)))))
 981                                 reason = "Maximum kick lengths differ or remote kick length not specified";
 982
 983                         if (((this->CapKeys.find("MAXGECOS") == this->CapKeys.end()) || ((this->CapKeys.find("MAXGECOS") != this->CapKeys.end()) && (this->CapKeys.find("MAXGECOS")->second != ConvToStr(MAXGECOS)))))
 984                                 reason = "Maximum GECOS (fullname) lengths differ or remote GECOS length not specified";
 985
 986                         if (((this->CapKeys.find("MAXAWAY") == this->CapKeys.end()) || ((this->CapKeys.find("MAXAWAY") != this->CapKeys.end()) && (this->CapKeys.find("MAXAWAY")->second != ConvToStr(MAXAWAY)))))
 987                                 reason = "Maximum awaymessage lengths differ or remote awaymessage length not specified";
 988
 989                         if (reason.length())
 990                         {
 991                                 this->WriteLine("ERROR :CAPAB negotiation failed: "+reason);
 992                                 return false;
 993                         }
 994                 }
 995                 else if ((params[0] == "MODULES") && (params.size() == 2))
 996                 {
 997                         if (!this->ModuleList.length())
 998                         {
 999                                 this->ModuleList.append(params[1]);
1000                         }
1001                         else
1002                         {
1003                                 this->ModuleList.append(",");
1004                                 this->ModuleList.append(params[1]);
1005                         }
1006                 }
1007                 else if ((params[0] == "CAPABILITIES") && (params.size() == 2))
1008                 {
1009                         irc::tokenstream capabs(params[1]);
1010                         std::string item = "*";
1011                         while ((item = capabs.GetToken()) != "")
1012                         {
1013                                 /* Process each key/value pair */
1014                                 std::string::size_type equals = item.rfind('=');
1015                                 if (equals != std::string::npos)
1016                                 {
1017                                         std::string var = item.substr(0, equals);
1018                                         std::string value = item.substr(equals+1, item.length());
1019                                         this->Instance->Log(DEBUG,"Key='%s' Value='%s'",var.c_str(),value.c_str());
1020                                         CapKeys[var] = value;
1021                                 }
1022                         }
1023                 }
1024
1025                 return true;
1026         }
1027
1028         /** This function forces this server to quit, removing this server
1029          * and any users on it (and servers and users below that, etc etc).
1030          * It's very slow and pretty clunky, but luckily unless your network
1031          * is having a REAL bad hair day, this function shouldnt be called
1032          * too many times a month ;-)
1033          */
1034         void SquitServer(std::string &from, TreeServer* Current)
1035         {
1036                 /* recursively squit the servers attached to 'Current'.
1037                  * We're going backwards so we don't remove users
1038                  * while we still need them ;)
1039                  */
1040                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
1041                 {
1042                         TreeServer* recursive_server = Current->GetChild(q);
1043                         this->SquitServer(from,recursive_server);
1044                 }
1045                 /* Now we've whacked the kids, whack self */
1046                 num_lost_servers++;
1047                 num_lost_users += Current->QuitUsers(from);
1048         }
1049
1050         /** This is a wrapper function for SquitServer above, which
1051          * does some validation first and passes on the SQUIT to all
1052          * other remaining servers.
1053          */
1054         void Squit(TreeServer* Current,std::string reason)
1055         {
1056                 if ((Current) && (Current != Utils->TreeRoot))
1057                 {
1058                         std::deque<std::string> params;
1059                         params.push_back(Current->GetName());
1060                         params.push_back(":"+reason);
1061                         Utils->DoOneToAllButSender(Current->GetParent()->GetName(),"SQUIT",params,Current->GetName());
1062                         if (Current->GetParent() == Utils->TreeRoot)
1063                         {
1064                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split: "+reason);
1065                         }
1066                         else
1067                         {
1068                                 this->Instance->WriteOpers("Server \002"+Current->GetName()+"\002 split from server \002"+Current->GetParent()->GetName()+"\002 with reason: "+reason);
1069                         }
1070                         num_lost_servers = 0;
1071                         num_lost_users = 0;
1072                         std::string from = Current->GetParent()->GetName()+" "+Current->GetName();
1073                         SquitServer(from, Current);
1074                         Current->Tidy();
1075                         Current->GetParent()->DelChild(Current);
1076                         DELETE(Current);
1077                         this->Instance->WriteOpers("Netsplit complete, lost \002%d\002 users on \002%d\002 servers.", num_lost_users, num_lost_servers);
1078                 }
1079                 else
1080                 {
1081                         Instance->Log(DEFAULT,"Squit from unknown server");
1082                 }
1083         }
1084
1085         /** FMODE command - server mode with timestamp checks */
1086         bool ForceMode(std::string source, std::deque<std::string> &params)
1087         {
1088                 /* Chances are this is a 1.0 FMODE without TS */
1089                 if (params.size() < 3)
1090                 {
1091                         this->WriteLine("ERROR :Version 1.0 FMODE sent to version 1.1 server");
1092                         return false;
1093                 }
1094
1095                 bool smode = false;
1096                 std::string sourceserv;
1097
1098                 /* Are we dealing with an FMODE from a user, or from a server? */
1099                 userrec* who = this->Instance->FindNick(source);
1100                 if (who)
1101                 {
1102                         /* FMODE from a user, set sourceserv to the users server name */
1103                         sourceserv = who->server;
1104                 }
1105                 else
1106                 {
1107                         /* FMODE from a server, create a fake user to receive mode feedback */
1108                         who = new userrec(this->Instance);
1109                         who->SetFd(FD_MAGIC_NUMBER);
1110                         smode = true;           /* Setting this flag tells us we should free the userrec later */
1111                         sourceserv = source;    /* Set sourceserv to the actual source string */
1112                 }
1113                 const char* modelist[64];
1114                 time_t TS = 0;
1115                 int n = 0;
1116                 memset(&modelist,0,sizeof(modelist));
1117                 for (unsigned int q = 0; (q < params.size()) && (q < 64); q++)
1118                 {
1119                         if (q == 1)
1120                         {
1121                                 /* The timestamp is in this position.
1122                                  * We don't want to pass that up to the
1123                                  * server->client protocol!
1124                                  */
1125                                 TS = atoi(params[q].c_str());
1126                         }
1127                         else
1128                         {
1129                                 /* Everything else is fine to append to the modelist */
1130                                 modelist[n++] = params[q].c_str();
1131                         }
1132
1133                 }
1134                 /* Extract the TS value of the object, either userrec or chanrec */
1135                 userrec* dst = this->Instance->FindNick(params[0]);
1136                 chanrec* chan = NULL;
1137                 time_t ourTS = 0;
1138                 if (dst)
1139                 {
1140                         ourTS = dst->age;
1141                 }
1142                 else
1143                 {
1144                         chan = this->Instance->FindChan(params[0]);
1145                         if (chan)
1146                         {
1147                                 ourTS = chan->age;
1148                         }
1149                         else
1150                                 /* Oops, channel doesnt exist! */
1151                                 return true;
1152                 }
1153
1154                 /* TS is equal: Merge the mode changes, use voooodoooooo on modes
1155                  * with parameters.
1156                  */
1157                 if (TS == ourTS)
1158                 {
1159                         Instance->Log(DEBUG,"Entering TS equality check");
1160                         ModeHandler* mh = NULL;
1161                         unsigned long paramptr = 3;
1162                         std::string to_bounce = "";
1163                         std::string to_keep = "";
1164                         std::vector<std::string> params_to_keep;
1165                         std::string params_to_bounce = "";
1166                         bool adding = true;
1167                         char cur_change = 1;
1168                         char old_change = 0;
1169                         char old_bounce_change = 0;
1170                         /* Merge modes, basically do special stuff to mode with params */
1171                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1172                         {
1173                                 switch (*x)
1174                                 {
1175                                         case '-':
1176                                                 adding = false;
1177                                         break;
1178                                         case '+':
1179                                                 adding = true;
1180                                         break;
1181                                         default:
1182                                                 if (adding)
1183                                                 {
1184                                                         /* We only care about whats being set,
1185                                                          * not whats being unset
1186                                                          */
1187                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1188
1189                                                         if ((mh) && (mh->GetNumParams(adding) > 0) && (!mh->IsListMode()))
1190                                                         {
1191                                                                 /* We only want to do special things to
1192                                                                  * modes with parameters, we are going to rewrite
1193                                                                  * those parameters
1194                                                                  */
1195                                                                 ModePair ret;
1196                                                                 adding ? cur_change = '+' : cur_change = '-';
1197
1198                                                                 ret = mh->ModeSet(smode ? NULL : who, dst, chan, params[paramptr]);
1199
1200                                                                 /* The mode is set here, check which we should keep */
1201                                                                 if (ret.first)
1202                                                                 {
1203                                                                         bool which_to_keep = mh->CheckTimeStamp(TS, ourTS, params[paramptr], ret.second, chan);
1204
1205                                                                         if (which_to_keep == true)
1206                                                                         {
1207                                                                                 /* Keep ours, bounce theirs:
1208                                                                                  * Send back ours to them and
1209                                                                                  * drop their mode changs
1210                                                                                  */
1211                                                                                 adding ? cur_change = '+' : cur_change = '-';
1212                                                                                 if (cur_change != old_bounce_change)
1213                                                                                         to_bounce += cur_change;
1214                                                                                 to_bounce += *x;
1215                                                                                 old_bounce_change = cur_change;
1216
1217                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1218                                                                                         params_to_bounce.append(" ").append(ret.second);
1219                                                                         }
1220                                                                         else
1221                                                                         {
1222                                                                                 /* Keep theirs: Accept their mode change,
1223                                                                                  * do nothing else
1224                                                                                  */
1225                                                                                 adding ? cur_change = '+' : cur_change = '-';
1226                                                                                 if (cur_change != old_change)
1227                                                                                         to_keep += cur_change;
1228                                                                                 to_keep += *x;
1229                                                                                 old_change = cur_change;
1230
1231                                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1232                                                                                         params_to_keep.push_back(params[paramptr]);
1233                                                                         }
1234                                                                 }
1235                                                                 else
1236                                                                 {
1237                                                                         /* Mode isnt set here, we want it */
1238                                                                         adding ? cur_change = '+' : cur_change = '-';
1239                                                                         if (cur_change != old_change)
1240                                                                                 to_keep += cur_change;
1241                                                                         to_keep += *x;
1242                                                                         old_change = cur_change;
1243
1244                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1245                                                                                 params_to_keep.push_back(params[paramptr]);
1246                                                                 }
1247
1248                                                                 paramptr++;
1249                                                         }
1250                                                         else
1251                                                         {
1252                                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1253
1254                                                                 if (mh)
1255                                                                 {
1256                                                                         adding ? cur_change = '+' : cur_change = '-';
1257
1258                                                                         /* Just keep this, safe to merge with no checks
1259                                                                          * it has no parameters
1260                                                                          */
1261
1262                                                                         if (cur_change != old_change)
1263                                                                                 to_keep += cur_change;
1264                                                                         to_keep += *x;
1265                                                                         old_change = cur_change;
1266
1267                                                                         if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1268                                                                         {
1269                                                                                 Instance->Log(DEBUG,"Mode removal %d %d",adding, mh->GetNumParams(adding));
1270                                                                                 params_to_keep.push_back(params[paramptr++]);
1271                                                                         }
1272                                                                 }
1273                                                         }
1274                                                 }
1275                                                 else
1276                                                 {
1277                                                         mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1278
1279                                                         if (mh)
1280                                                         {
1281                                                                 /* Taking a mode away */
1282                                                                 adding ? cur_change = '+' : cur_change = '-';
1283
1284                                                                 if (cur_change != old_change)
1285                                                                         to_keep += cur_change;
1286                                                                 to_keep += *x;
1287                                                                 old_change = cur_change;
1288
1289                                                                 if ((mh->GetNumParams(adding) > 0) && (paramptr < params.size()))
1290                                                                         params_to_keep.push_back(params[paramptr++]);
1291                                                         }
1292                                                 }
1293                                         break;
1294                                 }
1295                         }
1296
1297                         if (to_bounce.length())
1298                         {
1299                                 std::deque<std::string> newparams;
1300                                 newparams.push_back(params[0]);
1301                                 newparams.push_back(ConvToStr(ourTS));
1302                                 newparams.push_back(to_bounce+params_to_bounce);
1303                                 Instance->Log(DEBUG,"BOUNCE BACK: %s",(to_bounce+params_to_bounce).c_str());
1304                                 Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1305                         }
1306
1307                         if (to_keep.length())
1308                         {
1309                                 unsigned int n = 2;
1310                                 unsigned int q = 0;
1311                                 modelist[0] = params[0].c_str();
1312                                 modelist[1] = to_keep.c_str();
1313
1314                                 if (params_to_keep.size() > 0)
1315                                 {
1316                                         for (q = 0; (q < params_to_keep.size()) && (q < 64); q++)
1317                                         {
1318                                                 Instance->Log(DEBUG,"KEEP Item %d of %d: %s", q, params_to_keep.size(), params_to_keep[q].c_str());
1319                                                 modelist[n++] = params_to_keep[q].c_str();
1320                                         }
1321                                 }
1322
1323                                 if (smode)
1324                                 {
1325                                         Instance->Log(DEBUG,"Send mode");
1326                                         this->Instance->SendMode(modelist, n, who);
1327                                 }
1328                                 else
1329                                 {
1330                                         Instance->Log(DEBUG,"Send mode client");
1331                                         this->Instance->CallCommandHandler("MODE", modelist, n, who);
1332                                 }
1333
1334                                 /* HOT POTATO! PASS IT ON! */
1335                                 Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1336                         }
1337                 }
1338                 else
1339                 /* U-lined servers always win regardless of their TS */
1340                 if ((TS > ourTS) && (!this->Instance->ULine(source.c_str())))
1341                 {
1342                         /* Bounce the mode back to its sender.* We use our lower TS, so the other end
1343                          * SHOULD accept it, if its clock is right.
1344                          *
1345                          * NOTE: We should check that we arent bouncing anything thats already set at this end.
1346                          * If we are, bounce +ourmode to 'reinforce' it. This prevents desyncs.
1347                          * e.g. They send +l 50, we have +l 10 set. rather than bounce -l 50, we bounce +l 10.
1348                          *
1349                          * Thanks to jilles for pointing out this one-hell-of-an-issue before i even finished
1350                          * writing the code. It took me a while to come up with this solution.
1351                          *
1352                          * XXX: BE SURE YOU UNDERSTAND THIS CODE FULLY BEFORE YOU MESS WITH IT.
1353                          */
1354
1355                         std::deque<std::string> newparams;      /* New parameter list we send back */
1356                         newparams.push_back(params[0]);         /* Target, user or channel */
1357                         newparams.push_back(ConvToStr(ourTS));  /* Timestamp value of the target */
1358                         newparams.push_back("");                /* This contains the mode string. For now
1359                                                                  * it's empty, we fill it below.
1360                                                                  */
1361
1362                         /* Intelligent mode bouncing. Don't just invert, reinforce any modes which are already
1363                          * set to avoid a desync here.
1364                          */
1365                         std::string modebounce = "";
1366                         bool adding = true;
1367                         unsigned int t = 3;
1368                         ModeHandler* mh = NULL;
1369                         char cur_change = 1;
1370                         char old_change = 0;
1371                         for (std::string::iterator x = params[2].begin(); x != params[2].end(); x++)
1372                         {
1373                                 /* Iterate over all mode chars in the sent set */
1374                                 switch (*x)
1375                                 {
1376                                         /* Adding or subtracting modes? */
1377                                         case '-':
1378                                                 adding = false;
1379                                         break;
1380                                         case '+':
1381                                                 adding = true;
1382                                         break;
1383                                         default:
1384                                                 /* Find the mode handler for this mode */
1385                                                 mh = this->Instance->Modes->FindMode(*x, chan ? MODETYPE_CHANNEL : MODETYPE_USER);
1386
1387                                                 /* Got a mode handler?
1388                                                  * This also prevents us bouncing modes we have no handler for.
1389                                                  */
1390                                                 if (mh)
1391                                                 {
1392                                                         ModePair ret;
1393                                                         std::string p = "";
1394
1395                                                         /* Does the mode require a parameter right now?
1396                                                          * If it does, fetch it if we can
1397                                                          */
1398                                                         if ((mh->GetNumParams(adding) > 0) && (t < params.size()))
1399                                                                 p = params[t++];
1400
1401                                                         /* Call the ModeSet method to determine if its set with the
1402                                                          * given parameter here or not.
1403                                                          */
1404                                                         ret = mh->ModeSet(smode ? NULL : who, dst, chan, p);
1405
1406                                                         /* XXX: Really. Dont ask.
1407                                                          * Determine from if its set combined with what the current
1408                                                          * 'state' is (adding or not) as to wether we should 'invert'
1409                                                          * or 'reinforce' the mode change
1410                                                          */
1411                                                         (!ret.first ? (adding ? cur_change = '-' : cur_change = '+') : (!adding ? cur_change = '-' : cur_change = '+'));
1412
1413                                                         /* Quickly determine if we have 'flipped' from + to -,
1414                                                          * or - to +, to prevent unneccessary +/- chars in the
1415                                                          * output string that waste bandwidth
1416                                                          */
1417                                                         if (cur_change != old_change)
1418                                                                 modebounce += cur_change;
1419                                                         old_change = cur_change;
1420
1421                                                         /* Add the mode character to the output string */
1422                                                         modebounce += mh->GetModeChar();
1423
1424                                                         /* We got a parameter back from ModeHandler::ModeSet,
1425                                                          * are we supposed to be sending one out right now?
1426                                                          */
1427                                                         if (ret.second.length())
1428                                                         {
1429                                                                 if (mh->GetNumParams(cur_change == '+') > 0)
1430                                                                         /* Yes we're supposed to be sending out
1431                                                                          * the parameter. Make sure it goes
1432                                                                          */
1433                                                                         newparams.push_back(ret.second);
1434                                                         }
1435
1436                                                 }
1437                                         break;
1438                                 }
1439                         }
1440
1441                         /* Update the parameters for FMODE with the new 'bounced' string */
1442                         newparams[2] = modebounce;
1443                         /* Only send it back the way it came, no need to send it anywhere else */
1444                         Utils->DoOneToOne(this->Instance->Config->ServerName,"FMODE",newparams,sourceserv);
1445                         Instance->Log(DEBUG,"FMODE bounced intelligently, our TS less than theirs and the other server is NOT a uline.");
1446                 }
1447                 else
1448                 {
1449                         Instance->Log(DEBUG,"Allow modes, TS lower for sender");
1450                         /* The server was ulined, but something iffy is up with the TS.
1451                          * Sound the alarm bells!
1452                          */
1453                         if ((this->Instance->ULine(sourceserv.c_str())) && (TS > ourTS))
1454                         {
1455                                 this->Instance->WriteOpers("\2WARNING!\2 U-Lined server '%s' has bad TS for '%s' (accepted change): \2SYNC YOUR CLOCKS\2 to avoid this notice",sourceserv.c_str(),params[0].c_str());
1456                         }
1457                         /* Allow the mode, route it to either server or user command handling */
1458                         if (smode)
1459                                 this->Instance->SendMode(modelist,n,who);
1460                         else
1461                                 this->Instance->CallCommandHandler("MODE", modelist, n, who);
1462
1463                         /* HOT POTATO! PASS IT ON! */
1464                         Utils->DoOneToAllButSender(source,"FMODE",params,sourceserv);
1465                 }
1466                 /* Are we supposed to free the userrec? */
1467                 if (smode)
1468                         DELETE(who);
1469
1470                 return true;
1471         }
1472
1473         /** FTOPIC command */
1474         bool ForceTopic(std::string source, std::deque<std::string> &params)
1475         {
1476                 if (params.size() != 4)
1477                         return true;
1478                 time_t ts = atoi(params[1].c_str());
1479                 std::string nsource = source;
1480
1481                 chanrec* c = this->Instance->FindChan(params[0]);
1482                 if (c)
1483                 {
1484                         if ((ts >= c->topicset) || (!*c->topic))
1485                         {
1486                                 std::string oldtopic = c->topic;
1487                                 strlcpy(c->topic,params[3].c_str(),MAXTOPIC);
1488                                 strlcpy(c->setby,params[2].c_str(),NICKMAX-1);
1489                                 c->topicset = ts;
1490                                 /* if the topic text is the same as the current topic,
1491                                  * dont bother to send the TOPIC command out, just silently
1492                                  * update the set time and set nick.
1493                                  */
1494                                 if (oldtopic != params[3])
1495                                 {
1496                                         userrec* user = this->Instance->FindNick(source);
1497                                         if (!user)
1498                                         {
1499                                                 c->WriteChannelWithServ(source.c_str(), "TOPIC %s :%s", c->name, c->topic);
1500                                         }
1501                                         else
1502                                         {
1503                                                 c->WriteChannel(user, "TOPIC %s :%s", c->name, c->topic);
1504                                                 nsource = user->server;
1505                                         }
1506                                         /* all done, send it on its way */
1507                                         params[3] = ":" + params[3];
1508                                         Utils->DoOneToAllButSender(source,"FTOPIC",params,nsource);
1509                                 }
1510                         }
1511
1512                 }
1513
1514                 return true;
1515         }
1516
1517         /** FJOIN, similar to TS6 SJOIN, but not quite. */
1518         bool ForceJoin(std::string source, std::deque<std::string> &params)
1519         {
1520                 /* 1.1 FJOIN works as follows:
1521                  *
1522                  * Each FJOIN is sent along with a timestamp, and the side with the lowest
1523                  * timestamp 'wins'. From this point on we will refer to this side as the
1524                  * winner. The side with the higher timestamp loses, from this point on we
1525                  * will call this side the loser or losing side. This should be familiar to
1526                  * anyone who's dealt with dreamforge or TS6 before.
1527                  *
1528                  * When two sides of a split heal and this occurs, the following things
1529                  * will happen:
1530                  *
1531                  * If the timestamps are exactly equal, both sides merge their privilages
1532                  * and users, as in InspIRCd 1.0 and ircd2.8. The channels have not been
1533                  * re-created during a split, this is safe to do.
1534                  *
1535                  *
1536                  * If the timestamps are NOT equal, the losing side removes all privilage
1537                  * modes from all of its users that currently exist in the channel, before
1538                  * introducing new users into the channel which are listed in the FJOIN
1539                  * command's parameters. This means, all modes +ohv, and privilages added
1540                  * by modules, such as +qa. The losing side then LOWERS its timestamp value
1541                  * of the channel to match that of the winning side, and the modes of the
1542                  * users of the winning side are merged in with the losing side. The loser
1543                  * then sends out a set of FMODE commands which 'confirm' that it just
1544                  * removed all privilage modes from its existing users, which allows for
1545                  * services packages to still work correctly without needing to know the
1546                  * timestamping rules which InspIRCd follows. In TS6 servers this is always
1547                  * a problem, and services packages must contain code which explicitly
1548                  * behaves as TS6 does, removing ops from the losing side of a split where
1549                  * neccessary within its internal records, as this state information is
1550                  * not explicitly echoed out in that protocol.
1551                  *
1552                  * The winning side on the other hand will ignore all user modes from the
1553                  * losing side, so only its own modes get applied. Life is simple for those
1554                  * who succeed at internets. :-)
1555                  *
1556                  * NOTE: Unlike TS6 and dreamforge and other protocols which have SJOIN,
1557                  * FJOIN does not contain the simple-modes such as +iklmnsp. Why not,
1558                  * you ask? Well, quite simply because we don't need to. They'll be sent
1559                  * after the FJOIN by FMODE, and FMODE is timestamped, so in the event
1560                  * the losing side sends any modes for the channel which shouldnt win,
1561                  * they wont as their timestamp will be too high :-)
1562                  */
1563
1564                 if (params.size() < 3)
1565                         return true;
1566
1567                 char first[MAXBUF];             /* The first parameter of the mode command */
1568                 char modestring[MAXBUF];        /* The mode sequence (2nd parameter) of the mode command */
1569                 char* mode_users[127];          /* The values used by the mode command */
1570                 memset(&mode_users,0,sizeof(mode_users));       /* Initialize mode parameters */
1571                 mode_users[0] = first;          /* Set this up to be our on-stack value */
1572                 mode_users[1] = modestring;     /* Same here as above */
1573                 strcpy(modestring,"+");         /* Initialize the mode sequence to just '+' */
1574                 unsigned int modectr = 2;       /* Pointer to the third mode parameter (e.g. the one after the +-sequence) */
1575
1576                 userrec* who = NULL;                    /* User we are currently checking */
1577                 std::string channel = params[0];        /* Channel name, as a string */
1578                 time_t TS = atoi(params[1].c_str());    /* Timestamp given to us for remote side */
1579
1580                 /* Try and find the channel */
1581                 chanrec* chan = this->Instance->FindChan(channel);
1582
1583                 /* Initialize channel name in the mode parameters */
1584                 strlcpy(mode_users[0],channel.c_str(),MAXBUF);
1585
1586                 /* default TS is a high value, which if we dont have this
1587                  * channel will let the other side apply their modes.
1588                  */
1589                 time_t ourTS = time(NULL)+600;
1590
1591                 /* Does this channel exist? if it does, get its REAL timestamp */
1592                 if (chan)
1593                         ourTS = chan->age;
1594
1595                 /* In 1.1, if they have the newer channel, we immediately clear
1596                  * all status modes from our users. We then accept their modes.
1597                  * If WE have the newer channel its the other side's job to do this.
1598                  * Note that this causes the losing server to send out confirming
1599                  * FMODE lines.
1600                  */
1601                 if (ourTS > TS)
1602                 {
1603                         std::deque<std::string> param_list;
1604
1605                         if (chan)
1606                                 chan->age = TS;
1607
1608                         /* Lower the TS here */
1609                         if (Utils->AnnounceTSChange && chan)
1610                                 chan->WriteChannelWithServ(Instance->Config->ServerName,
1611                                 "TS for %s changed from %lu to %lu", chan->name, ourTS, TS);
1612                         ourTS = TS;
1613
1614                         param_list.push_back(channel);
1615                         /* Zap all the privilage modes on our side */
1616                         this->RemoveStatus(Instance->Config->ServerName, param_list);
1617                 }
1618
1619                 /* Put the final parameter of the FJOIN into a tokenstream ready to split it */
1620                 irc::tokenstream users(params[2]);
1621                 std::string item = "*";
1622
1623                 /* do this first, so our mode reversals are correctly received by other servers
1624                  * if there is a TS collision.
1625                  */
1626                 params[2] = ":" + params[2];
1627                 Utils->DoOneToAllButSender(source,"FJOIN",params,source);
1628
1629                 /* Now, process every 'prefixes,nick' pair */
1630                 while (item != "")
1631                 {
1632                         /* Find next user */
1633                         item = users.GetToken();
1634
1635                         const char* usr = item.c_str();
1636
1637                         /* Safety check just to make sure someones not sent us an FJOIN full of spaces
1638                          * (is this even possible?) */
1639                         if (usr && *usr)
1640                         {
1641                                 const char* permissions = usr;
1642                                 int ntimes = 0;
1643                                 char* nm = new char[MAXBUF];
1644                                 char* tnm = nm;
1645
1646                                 /* Iterate through all the prefix values, convert them from prefixes
1647                                  * to mode letters, and append them to the mode sequence
1648                                  */
1649                                 while ((*permissions) && (*permissions != ',') && (ntimes < MAXBUF))
1650                                 {
1651                                         ModeHandler* mh = Instance->Modes->FindPrefix(*permissions);
1652                                         if (mh)
1653                                         {
1654                                                 /* This is a valid prefix */
1655                                                 ntimes++;
1656                                                 *tnm++ = mh->GetModeChar();
1657                                         }
1658                                         else
1659                                         {
1660                                                 /* Not a valid prefix...
1661                                                  * danger bill bobbertson! (that's will robinsons older brother ;-) ...)
1662                                                  */
1663                                                 this->Instance->WriteOpers("ERROR: We received a user with an unknown prefix '%c'. Closed connection to avoid a desync.",*permissions);
1664                                                 this->WriteLine(std::string("ERROR :Invalid prefix '")+(*permissions)+"' in FJOIN");
1665                                                 return false;
1666                                         }
1667                                         usr++;
1668                                         permissions++;
1669                                 }
1670
1671                                 /* Null terminate modes */
1672                                 *tnm = 0;
1673                                 /* Advance past the comma, to the nick */
1674                                 usr++;
1675
1676                                 /* Check the user actually exists */
1677                                 who = this->Instance->FindNick(usr);
1678                                 if (who)
1679                                 {
1680                                         /* Did they get any modes? How many times? */
1681                                         strlcat(modestring, nm, MAXBUF);
1682                                         for (int k = 0; k < ntimes; k++)
1683                                                 mode_users[modectr++] = strdup(usr);
1684
1685                                         /* Free temporary buffer used for mode sequence */
1686                                         delete[] nm;
1687
1688                                         /* Check that the user's 'direction' is correct
1689                                          * based on the server sending the FJOIN. We must
1690                                          * check each nickname in turn, because the origin of
1691                                          * the FJOIN may be different to the origin of the nicks
1692                                          * in the command itself.
1693                                          */
1694                                         TreeServer* route_back_again = Utils->BestRouteTo(who->server);
1695                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
1696                                         {
1697                                                 /* Oh dear oh dear. */
1698                                                 Instance->Log(DEBUG,"Fake direction in FJOIN, user '%s'",who->nick);
1699                                                 continue;
1700                                         }
1701                                         /* Finally, we can actually place the user into the channel.
1702                                          * We're sure its right. Final answer, phone a friend.
1703                                          */
1704                                         chanrec::JoinUser(this->Instance, who, channel.c_str(), true, "");
1705
1706                                         /* Have we already queued up MAXMODES modes with parameters
1707                                          * (+qaohv) ready to be sent to the server?
1708                                          */
1709                                         if (modectr >= (MAXMODES-1))
1710                                         {
1711                                                 /* Only actually give the users any status if we lost
1712                                                  * the FJOIN or drew (equal timestamps).
1713                                                  * It isn't actually possible for ourTS to be > TS here,
1714                                                  * only possible to actually have ourTS == TS, or
1715                                                  * ourTS < TS, because if we lost, we already lowered
1716                                                  * our TS above before we entered this loop. We only
1717                                                  * check >= as a safety measure, in case someone stuffed
1718                                                  * up. If someone DID stuff up, it was most likely me.
1719                                                  * Note: I do not like baseball bats in the face...
1720                                                  */
1721                                                 if (ourTS >= TS)
1722                                                 {
1723                                                         Instance->Log(DEBUG,"Our our channel newer than theirs, accepting their modes");
1724                                                         this->Instance->SendMode((const char**)mode_users,modectr,who);
1725
1726                                                         /* Something stuffed up, and for some reason, the timestamp is
1727                                                          * NOT lowered right now and should be. Lower it. Usually this
1728                                                          * code won't be executed, doubtless someone will remove it some
1729                                                          * day soon.
1730                                                          */
1731                                                         if (ourTS > TS)
1732                                                         {
1733                                                                 Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1734                                                                 chan->age = TS;
1735                                                                 ourTS = TS;
1736                                                         }
1737                                                 }
1738
1739                                                 /* Reset all this back to defaults, and
1740                                                  * free any ram we have left allocated.
1741                                                  */
1742                                                 strcpy(mode_users[1],"+");
1743                                                 for (unsigned int f = 2; f < modectr; f++)
1744                                                         free(mode_users[f]);
1745                                                 modectr = 2;
1746                                         }
1747                                 }
1748                                 else
1749                                 {
1750                                         /* Remember to free this */
1751                                         delete[] nm;
1752                                         /* If we got here, there's a nick in FJOIN which doesnt exist on this server.
1753                                          * We don't try to process the nickname here (that WOULD cause a segfault because
1754                                          * we'd be playing with null pointers) however, we DO pass the nickname on, just
1755                                          * in case somehow we're desynched, so that other users which might be able to see
1756                                          * the nickname get their fair chance to process it.
1757                                          */
1758                                         Instance->Log(SPARSE,"Warning! Invalid user in FJOIN to channel %s IGNORED", channel.c_str());
1759                                         continue;
1760                                 }
1761                         }
1762                 }
1763
1764                 /* there werent enough modes built up to flush it during FJOIN,
1765                  * or, there are a number left over. flush them out.
1766                  */
1767                 if ((modectr > 2) && (who) && (chan))
1768                 {
1769                         if (ourTS >= TS)
1770                         {
1771                                 /* Our channel is newer than theirs. Evil deeds must be afoot. */
1772                                 this->Instance->SendMode((const char**)mode_users,modectr,who);
1773                                 /* Yet again, we can't actually get a true value here, if everything else
1774                                  * is working as it should.
1775                                  */
1776                                 if (ourTS > TS)
1777                                 {
1778                                         Instance->Log(DEFAULT,"Channel TS for %s changed from %lu to %lu",chan->name,ourTS,TS);
1779                                         chan->age = TS;
1780                                         ourTS = TS;
1781                                 }
1782                         }
1783
1784                         /* Free anything we have left to free */
1785                         for (unsigned int f = 2; f < modectr; f++)
1786                                 free(mode_users[f]);
1787                 }
1788
1789                 /* All done. That wasnt so bad was it, you can wipe
1790                  * the sweat from your forehead now. :-)
1791                  */
1792                 return true;
1793         }
1794
1795         /** NICK command */
1796         bool IntroduceClient(std::string source, std::deque<std::string> &params)
1797         {
1798                 if (params.size() < 8)
1799                         return true;
1800                 if (params.size() > 8)
1801                 {
1802                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+params[1]+" :Invalid client introduction ("+params[1]+"?)");
1803                         return true;
1804                 }
1805                 // NICK age nick host dhost ident +modes ip :gecos
1806                 //       0    1   2     3     4      5   6     7
1807                 time_t age = atoi(params[0].c_str());
1808
1809                 /* This used to have a pretty craq'y loop doing the same thing,
1810                  * now we just let the STL do the hard work (more efficiently)
1811                  */
1812                 std::string::size_type pos_after_plus = params[5].find_first_not_of('+');
1813                 if (pos_after_plus != std::string::npos)
1814                         params[5] = params[5].substr(pos_after_plus);
1815
1816                 const char* tempnick = params[1].c_str();
1817                 Instance->Log(DEBUG,"Introduce client %s!%s@%s",tempnick,params[4].c_str(),params[2].c_str());
1818
1819                 user_hash::iterator iter = this->Instance->clientlist.find(tempnick);
1820
1821                 if (iter != this->Instance->clientlist.end())
1822                 {
1823                         // nick collision
1824                         Instance->Log(DEBUG,"Nick collision on %s!%s@%s: %lu %lu",tempnick,params[4].c_str(),params[2].c_str(),(unsigned long)age,(unsigned long)iter->second->age);
1825                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" KILL "+tempnick+" :Nickname collision");
1826                         userrec::QuitUser(this->Instance, iter->second, "Nickname collision");
1827                         return true;
1828                 }
1829
1830                 userrec* _new = new userrec(this->Instance);
1831                 this->Instance->clientlist[tempnick] = _new;
1832                 _new->SetFd(FD_MAGIC_NUMBER);
1833                 strlcpy(_new->nick, tempnick,NICKMAX-1);
1834                 strlcpy(_new->host, params[2].c_str(),63);
1835                 strlcpy(_new->dhost, params[3].c_str(),63);
1836                 _new->server = this->Instance->FindServerNamePtr(source.c_str());
1837                 strlcpy(_new->ident, params[4].c_str(),IDENTMAX);
1838                 strlcpy(_new->fullname, params[7].c_str(),MAXGECOS);
1839                 _new->registered = REG_ALL;
1840                 _new->signon = age;
1841
1842                 for (std::string::iterator v = params[5].begin(); v != params[5].end(); v++)
1843                         _new->modes[(*v)-65] = 1;
1844
1845 #ifdef SUPPORT_IP6LINKS
1846                 if (params[6].find_first_of(":") != std::string::npos)
1847                         _new->SetSockAddr(AF_INET6, params[6].c_str(), 0);
1848                 else
1849 #endif
1850                         _new->SetSockAddr(AF_INET, params[6].c_str(), 0);
1851
1852                 this->Instance->SNO->WriteToSnoMask('C',"Client connecting at %s: %s!%s@%s [%s]",_new->server,_new->nick,_new->ident,_new->host, _new->GetIPString());
1853
1854                 params[7] = ":" + params[7];
1855                 Utils->DoOneToAllButSender(source,"NICK",params,source);
1856
1857                 // Increment the Source Servers User Count..
1858                 TreeServer* SourceServer = Utils->FindServer(source);
1859                 if (SourceServer)
1860                 {
1861                         Instance->Log(DEBUG,"Found source server of %s",_new->nick);
1862                         SourceServer->AddUserCount();
1863                 }
1864
1865                 FOREACH_MOD_I(Instance,I_OnPostConnect,OnPostConnect(_new));
1866
1867                 return true;
1868         }
1869
1870         /** Send one or more FJOINs for a channel of users.
1871          * If the length of a single line is more than 480-NICKMAX
1872          * in length, it is split over multiple lines.
1873          */
1874         void SendFJoins(TreeServer* Current, chanrec* c)
1875         {
1876                 Instance->Log(DEBUG,"Sending FJOINs to other server for %s",c->name);
1877                 char list[MAXBUF];
1878                 std::string individual_halfops = std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age);
1879
1880                 size_t dlen, curlen;
1881                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1882                 int numusers = 0;
1883                 char* ptr = list + dlen;
1884
1885                 CUList *ulist = c->GetUsers();
1886                 std::vector<userrec*> specific_halfop;
1887                 std::vector<userrec*> specific_voice;
1888                 std::string modes = "";
1889                 std::string params = "";
1890
1891                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1892                 {
1893                         // The first parameter gets a : before it
1894                         size_t ptrlen = snprintf(ptr, MAXBUF, " %s%s,%s", !numusers ? ":" : "", c->GetAllPrefixChars(i->second), i->second->nick);
1895
1896                         curlen += ptrlen;
1897                         ptr += ptrlen;
1898
1899                         numusers++;
1900
1901                         if (curlen > (480-NICKMAX))
1902                         {
1903                                 this->WriteLine(list);
1904                                 dlen = curlen = snprintf(list,MAXBUF,":%s FJOIN %s %lu",this->Instance->Config->ServerName,c->name,(unsigned long)c->age);
1905                                 ptr = list + dlen;
1906                                 ptrlen = 0;
1907                                 numusers = 0;
1908                         }
1909                 }
1910
1911                 if (numusers)
1912                         this->WriteLine(list);
1913
1914                 for (BanList::iterator b = c->bans.begin(); b != c->bans.end(); b++)
1915                 {
1916                         modes.append("b");
1917                         params.append(b->data).append(" ");
1918                 }
1919                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" +"+c->ChanModes(true)+modes+" "+params);
1920         }
1921
1922         /** Send G, Q, Z and E lines */
1923         void SendXLines(TreeServer* Current)
1924         {
1925                 char data[MAXBUF];
1926                 std::string n = this->Instance->Config->ServerName;
1927                 const char* sn = n.c_str();
1928                 int iterations = 0;
1929                 /* Yes, these arent too nice looking, but they get the job done */
1930                 for (std::vector<ZLine*>::iterator i = Instance->XLines->zlines.begin(); i != Instance->XLines->zlines.end(); i++, iterations++)
1931                 {
1932                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1933                         this->WriteLine(data);
1934                 }
1935                 for (std::vector<QLine*>::iterator i = Instance->XLines->qlines.begin(); i != Instance->XLines->qlines.end(); i++, iterations++)
1936                 {
1937                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1938                         this->WriteLine(data);
1939                 }
1940                 for (std::vector<GLine*>::iterator i = Instance->XLines->glines.begin(); i != Instance->XLines->glines.end(); i++, iterations++)
1941                 {
1942                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1943                         this->WriteLine(data);
1944                 }
1945                 for (std::vector<ELine*>::iterator i = Instance->XLines->elines.begin(); i != Instance->XLines->elines.end(); i++, iterations++)
1946                 {
1947                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1948                         this->WriteLine(data);
1949                 }
1950                 for (std::vector<ZLine*>::iterator i = Instance->XLines->pzlines.begin(); i != Instance->XLines->pzlines.end(); i++, iterations++)
1951                 {
1952                         snprintf(data,MAXBUF,":%s ADDLINE Z %s %s %lu %lu :%s",sn,(*i)->ipaddr,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1953                         this->WriteLine(data);
1954                 }
1955                 for (std::vector<QLine*>::iterator i = Instance->XLines->pqlines.begin(); i != Instance->XLines->pqlines.end(); i++, iterations++)
1956                 {
1957                         snprintf(data,MAXBUF,":%s ADDLINE Q %s %s %lu %lu :%s",sn,(*i)->nick,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1958                         this->WriteLine(data);
1959                 }
1960                 for (std::vector<GLine*>::iterator i = Instance->XLines->pglines.begin(); i != Instance->XLines->pglines.end(); i++, iterations++)
1961                 {
1962                         snprintf(data,MAXBUF,":%s ADDLINE G %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1963                         this->WriteLine(data);
1964                 }
1965                 for (std::vector<ELine*>::iterator i = Instance->XLines->pelines.begin(); i != Instance->XLines->pelines.end(); i++, iterations++)
1966                 {
1967                         snprintf(data,MAXBUF,":%s ADDLINE E %s %s %lu %lu :%s",sn,(*i)->hostmask,(*i)->source,(unsigned long)(*i)->set_time,(unsigned long)(*i)->duration,(*i)->reason);
1968                         this->WriteLine(data);
1969                 }
1970         }
1971
1972         /** Send channel modes and topics */
1973         void SendChannelModes(TreeServer* Current)
1974         {
1975                 char data[MAXBUF];
1976                 std::deque<std::string> list;
1977                 int iterations = 0;
1978                 std::string n = this->Instance->Config->ServerName;
1979                 const char* sn = n.c_str();
1980                 for (chan_hash::iterator c = this->Instance->chanlist.begin(); c != this->Instance->chanlist.end(); c++, iterations++)
1981                 {
1982                         SendFJoins(Current, c->second);
1983                         if (*c->second->topic)
1984                         {
1985                                 snprintf(data,MAXBUF,":%s FTOPIC %s %lu %s :%s",sn,c->second->name,(unsigned long)c->second->topicset,c->second->setby,c->second->topic);
1986                                 this->WriteLine(data);
1987                         }
1988                         FOREACH_MOD_I(this->Instance,I_OnSyncChannel,OnSyncChannel(c->second,(Module*)Utils->Creator,(void*)this));
1989                         list.clear();
1990                         c->second->GetExtList(list);
1991                         for (unsigned int j = 0; j < list.size(); j++)
1992                         {
1993                                 FOREACH_MOD_I(this->Instance,I_OnSyncChannelMetaData,OnSyncChannelMetaData(c->second,(Module*)Utils->Creator,(void*)this,list[j]));
1994                         }
1995                 }
1996         }
1997
1998         /** send all users and their oper state/modes */
1999         void SendUsers(TreeServer* Current)
2000         {
2001                 char data[MAXBUF];
2002                 std::deque<std::string> list;
2003                 int iterations = 0;
2004                 for (user_hash::iterator u = this->Instance->clientlist.begin(); u != this->Instance->clientlist.end(); u++, iterations++)
2005                 {
2006                         if (u->second->registered == REG_ALL)
2007                         {
2008                                 snprintf(data,MAXBUF,":%s NICK %lu %s %s %s %s +%s %s :%s",u->second->server,(unsigned long)u->second->age,u->second->nick,u->second->host,u->second->dhost,u->second->ident,u->second->FormatModes(),u->second->GetIPString(),u->second->fullname);
2009                                 this->WriteLine(data);
2010                                 if (*u->second->oper)
2011                                 {
2012                                         this->WriteLine(":"+std::string(u->second->nick)+" OPERTYPE "+std::string(u->second->oper));
2013                                 }
2014                                 if (*u->second->awaymsg)
2015                                 {
2016                                         this->WriteLine(":"+std::string(u->second->nick)+" AWAY :"+std::string(u->second->awaymsg));
2017                                 }
2018                                 FOREACH_MOD_I(this->Instance,I_OnSyncUser,OnSyncUser(u->second,(Module*)Utils->Creator,(void*)this));
2019                                 list.clear();
2020                                 u->second->GetExtList(list);
2021                                 for (unsigned int j = 0; j < list.size(); j++)
2022                                 {
2023                                         FOREACH_MOD_I(this->Instance,I_OnSyncUserMetaData,OnSyncUserMetaData(u->second,(Module*)Utils->Creator,(void*)this,list[j]));
2024                                 }
2025                         }
2026                 }
2027         }
2028
2029         /** This function is called when we want to send a netburst to a local
2030          * server. There is a set order we must do this, because for example
2031          * users require their servers to exist, and channels require their
2032          * users to exist. You get the idea.
2033          */
2034         void DoBurst(TreeServer* s)
2035         {
2036                 std::string burst = "BURST "+ConvToStr(time(NULL));
2037                 std::string endburst = "ENDBURST";
2038                 // Because by the end of the netburst, it  could be gone!
2039                 std::string name = s->GetName();
2040                 this->Instance->SNO->WriteToSnoMask('l',"Bursting to \2"+name+"\2.");
2041                 this->WriteLine(burst);
2042                 /* send our version string */
2043                 this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" VERSION :"+this->Instance->GetVersionString());
2044                 /* Send server tree */
2045                 this->SendServers(Utils->TreeRoot,s,1);
2046                 /* Send users and their oper status */
2047                 this->SendUsers(s);
2048                 /* Send everything else (channel modes, xlines etc) */
2049                 this->SendChannelModes(s);
2050                 this->SendXLines(s);
2051                 FOREACH_MOD_I(this->Instance,I_OnSyncOtherMetaData,OnSyncOtherMetaData((Module*)Utils->Creator,(void*)this));
2052                 this->WriteLine(endburst);
2053                 this->Instance->SNO->WriteToSnoMask('l',"Finished bursting to \2"+name+"\2.");
2054         }
2055
2056         /** This function is called when we receive data from a remote
2057          * server. We buffer the data in a std::string (it doesnt stay
2058          * there for long), reading using InspSocket::Read() which can
2059          * read up to 16 kilobytes in one operation.
2060          *
2061          * IF THIS FUNCTION RETURNS FALSE, THE CORE CLOSES AND DELETES
2062          * THE SOCKET OBJECT FOR US.
2063          */
2064         virtual bool OnDataReady()
2065         {
2066                 char* data = this->Read();
2067                 /* Check that the data read is a valid pointer and it has some content */
2068                 if (data && *data)
2069                 {
2070                         this->in_buffer.append(data);
2071                         /* While there is at least one new line in the buffer,
2072                          * do something useful (we hope!) with it.
2073                          */
2074                         while (in_buffer.find("\n") != std::string::npos)
2075                         {
2076                                 std::string ret = in_buffer.substr(0,in_buffer.find("\n")-1);
2077                                 in_buffer = in_buffer.substr(in_buffer.find("\n")+1,in_buffer.length()-in_buffer.find("\n"));
2078                                 if (ret.find("\r") != std::string::npos)
2079                                         ret = in_buffer.substr(0,in_buffer.find("\r")-1);
2080                                 /* Process this one, abort if it
2081                                  * didnt return true.
2082                                  */
2083                                 if (this->ctx_in)
2084                                 {
2085                                         char out[1024];
2086                                         char result[1024];
2087                                         memset(result,0,1024);
2088                                         memset(out,0,1024);
2089                                         /* ERROR + CAPAB is still allowed unencryped */
2090                                         if ((ret.substr(0,7) != "ERROR :") && (ret.substr(0,6) != "CAPAB "))
2091                                         {
2092                                                 int nbytes = from64tobits(out, ret.c_str(), 1024);
2093                                                 if ((nbytes > 0) && (nbytes < 1024))
2094                                                 {
2095                                                         ctx_in->Decrypt(out, result, nbytes, 0);
2096                                                         for (int t = 0; t < nbytes; t++)
2097                                                                 if (result[t] == '\7') result[t] = 0;
2098                                                         ret = result;
2099                                                 }
2100                                         }
2101                                 }
2102                                 if (!this->ProcessLine(ret))
2103                                 {
2104                                         Instance->Log(DEBUG,"ProcessLine says no!");
2105                                         return false;
2106                                 }
2107                         }
2108                         return true;
2109                 }
2110                 /* EAGAIN returns an empty but non-NULL string, so this
2111                  * evaluates to TRUE for EAGAIN but to FALSE for EOF.
2112                  */
2113                 return (data && !*data);
2114         }
2115
2116         int WriteLine(std::string line)
2117         {
2118                 Instance->Log(DEBUG,"OUT: %s",line.c_str());
2119                 if (this->ctx_out)
2120                 {
2121                         char result[10240];
2122                         char result64[10240];
2123                         if (this->keylength)
2124                         {
2125                                 // pad it to the key length
2126                                 int n = this->keylength - (line.length() % this->keylength);
2127                                 if (n)
2128                                         line.append(n,'\7');
2129                         }
2130                         unsigned int ll = line.length();
2131                         ctx_out->Encrypt(line.c_str(), result, ll, 0);
2132                         to64frombits((unsigned char*)result64,(unsigned char*)result,ll);
2133                         line = result64;
2134                 }
2135                 return this->Write(line + "\r\n");
2136         }
2137
2138         /* Handle ERROR command */
2139         bool Error(std::deque<std::string> &params)
2140         {
2141                 if (params.size() < 1)
2142                         return false;
2143                 this->Instance->SNO->WriteToSnoMask('l',"ERROR from %s: %s",(InboundServerName != "" ? InboundServerName.c_str() : myhost.c_str()),params[0].c_str());
2144                 /* we will return false to cause the socket to close. */
2145                 return false;
2146         }
2147
2148         /** remote MOTD. leet, huh? */
2149         bool Motd(std::string prefix, std::deque<std::string> &params)
2150         {
2151                 if (params.size() > 0)
2152                 {
2153                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2154                         {
2155                                 /* It's for our server */
2156                                 string_list results;
2157                                 userrec* source = this->Instance->FindNick(prefix);
2158
2159                                 if (source)
2160                                 {
2161                                         std::deque<std::string> par;
2162                                         par.push_back(prefix);
2163                                         par.push_back("");
2164
2165                                         if (!Instance->Config->MOTD.size())
2166                                         {
2167                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 422 "+source->nick+" :Message of the day file is missing.";
2168                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2169                                                 return true;
2170                                         }
2171
2172                                         par[1] = std::string("::")+Instance->Config->ServerName+" 375 "+source->nick+" :"+Instance->Config->ServerName+" message of the day";
2173                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2174
2175                                         for (unsigned int i = 0; i < Instance->Config->MOTD.size(); i++)
2176                                         {
2177                                                 par[1] = std::string("::")+Instance->Config->ServerName+" 372 "+source->nick+" :- "+Instance->Config->MOTD[i];
2178                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2179                                         }
2180
2181                                         par[1] = std::string("::")+Instance->Config->ServerName+" 376 "+source->nick+" End of message of the day.";
2182                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2183                                 }
2184                         }
2185                         else
2186                         {
2187                                 /* Pass it on */
2188                                 userrec* source = this->Instance->FindNick(prefix);
2189                                 if (source)
2190                                         Utils->DoOneToOne(prefix, "MOTD", params, params[0]);
2191                         }
2192                 }
2193                 return true;
2194         }
2195
2196         /** remote ADMIN. leet, huh? */
2197         bool Admin(std::string prefix, std::deque<std::string> &params)
2198         {
2199                 if (params.size() > 0)
2200                 {
2201                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[0]))
2202                         {
2203                                 /* It's for our server */
2204                                 string_list results;
2205                                 userrec* source = this->Instance->FindNick(prefix);
2206
2207                                 if (source)
2208                                 {
2209                                         std::deque<std::string> par;
2210                                         par.push_back(prefix);
2211                                         par.push_back("");
2212
2213                                         par[1] = std::string("::")+Instance->Config->ServerName+" 256 "+source->nick+" :Administrative info for "+Instance->Config->ServerName;
2214                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2215
2216                                         par[1] = std::string("::")+Instance->Config->ServerName+" 257 "+source->nick+" :Name     - "+Instance->Config->AdminName;
2217                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2218
2219                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :Nickname - "+Instance->Config->AdminNick;
2220                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2221
2222                                         par[1] = std::string("::")+Instance->Config->ServerName+" 258 "+source->nick+" :E-Mail   - "+Instance->Config->AdminEmail;
2223                                         Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2224                                 }
2225                         }
2226                         else
2227                         {
2228                                 /* Pass it on */
2229                                 userrec* source = this->Instance->FindNick(prefix);
2230                                 if (source)
2231                                         Utils->DoOneToOne(prefix, "ADMIN", params, params[0]);
2232                         }
2233                 }
2234                 return true;
2235         }
2236
2237         bool Stats(std::string prefix, std::deque<std::string> &params)
2238         {
2239                 /* Get the reply to a STATS query if it matches this servername,
2240                  * and send it back as a load of PUSH queries
2241                  */
2242                 if (params.size() > 1)
2243                 {
2244                         if (this->Instance->MatchText(this->Instance->Config->ServerName, params[1]))
2245                         {
2246                                 /* It's for our server */
2247                                 string_list results;
2248                                 userrec* source = this->Instance->FindNick(prefix);
2249                                 if (source)
2250                                 {
2251                                         std::deque<std::string> par;
2252                                         par.push_back(prefix);
2253                                         par.push_back("");
2254                                         DoStats(this->Instance, *(params[0].c_str()), source, results);
2255                                         for (size_t i = 0; i < results.size(); i++)
2256                                         {
2257                                                 par[1] = "::" + results[i];
2258                                                 Utils->DoOneToOne(this->Instance->Config->ServerName, "PUSH",par, source->server);
2259                                         }
2260                                 }
2261                         }
2262                         else
2263                         {
2264                                 /* Pass it on */
2265                                 userrec* source = this->Instance->FindNick(prefix);
2266                                 if (source)
2267                                         Utils->DoOneToOne(prefix, "STATS", params, params[1]);
2268                         }
2269                 }
2270                 return true;
2271         }
2272
2273
2274         /** Because the core won't let users or even SERVERS set +o,
2275          * we use the OPERTYPE command to do this.
2276          */
2277         bool OperType(std::string prefix, std::deque<std::string> &params)
2278         {
2279                 if (params.size() != 1)
2280                 {
2281                         Instance->Log(DEBUG,"Received invalid oper type from %s",prefix.c_str());
2282                         return true;
2283                 }
2284                 std::string opertype = params[0];
2285                 userrec* u = this->Instance->FindNick(prefix);
2286                 if (u)
2287                 {
2288                         u->modes[UM_OPERATOR] = 1;
2289                         strlcpy(u->oper,opertype.c_str(),NICKMAX-1);
2290                         Utils->DoOneToAllButSender(u->nick,"OPERTYPE",params,u->server);
2291                 }
2292                 return true;
2293         }
2294
2295         /** Because Andy insists that services-compatible servers must
2296          * implement SVSNICK and SVSJOIN, that's exactly what we do :p
2297          */
2298         bool ForceNick(std::string prefix, std::deque<std::string> &params)
2299         {
2300                 if (params.size() < 3)
2301                         return true;
2302
2303                 userrec* u = this->Instance->FindNick(params[0]);
2304
2305                 if (u)
2306                 {
2307                         Utils->DoOneToAllButSender(prefix,"SVSNICK",params,prefix);
2308                         if (IS_LOCAL(u))
2309                         {
2310                                 std::deque<std::string> par;
2311                                 par.push_back(params[1]);
2312                                 /* This is not required as one is sent in OnUserPostNick below
2313                                  */
2314                                 //Utils->DoOneToMany(u->nick,"NICK",par);
2315                                 if (!u->ForceNickChange(params[1].c_str()))
2316                                 {
2317                                         userrec::QuitUser(this->Instance, u, "Nickname collision");
2318                                         return true;
2319                                 }
2320                                 u->age = atoi(params[2].c_str());
2321                         }
2322                 }
2323                 return true;
2324         }
2325
2326         bool ServiceJoin(std::string prefix, std::deque<std::string> &params)
2327         {
2328                 if (params.size() < 2)
2329                         return true;
2330
2331                 userrec* u = this->Instance->FindNick(params[0]);
2332
2333                 if (u)
2334                 {
2335                         chanrec::JoinUser(this->Instance, u, params[1].c_str(), false);
2336                         Utils->DoOneToAllButSender(prefix,"SVSJOIN",params,prefix);
2337                 }
2338                 return true;
2339         }
2340
2341         bool RemoteRehash(std::string prefix, std::deque<std::string> &params)
2342         {
2343                 if (params.size() < 1)
2344                         return false;
2345
2346                 std::string servermask = params[0];
2347
2348                 if (this->Instance->MatchText(this->Instance->Config->ServerName,servermask))
2349                 {
2350                         this->Instance->SNO->WriteToSnoMask('l',"Remote rehash initiated from server \002"+prefix+"\002.");
2351                         this->Instance->RehashServer();
2352                         Utils->ReadConfiguration(false);
2353                         InitializeDisabledCommands(Instance->Config->DisabledCommands, Instance);
2354                 }
2355                 Utils->DoOneToAllButSender(prefix,"REHASH",params,prefix);
2356                 return true;
2357         }
2358
2359         bool RemoteKill(std::string prefix, std::deque<std::string> &params)
2360         {
2361                 if (params.size() != 2)
2362                         return true;
2363
2364                 std::string nick = params[0];
2365                 userrec* u = this->Instance->FindNick(prefix);
2366                 userrec* who = this->Instance->FindNick(nick);
2367
2368                 if (who)
2369                 {
2370                         /* Prepend kill source, if we don't have one */
2371                         std::string sourceserv = prefix;
2372                         if (u)
2373                         {
2374                                 sourceserv = u->server;
2375                         }
2376                         if (*(params[1].c_str()) != '[')
2377                         {
2378                                 params[1] = "[" + sourceserv + "] Killed (" + params[1] +")";
2379                         }
2380                         std::string reason = params[1];
2381                         params[1] = ":" + params[1];
2382                         Utils->DoOneToAllButSender(prefix,"KILL",params,sourceserv);
2383                         who->Write(":%s KILL %s :%s (%s)", sourceserv.c_str(), who->nick, sourceserv.c_str(), reason.c_str());
2384                         userrec::QuitUser(this->Instance,who,reason);
2385                 }
2386                 return true;
2387         }
2388
2389         bool LocalPong(std::string prefix, std::deque<std::string> &params)
2390         {
2391                 if (params.size() < 1)
2392                         return true;
2393
2394                 if (params.size() == 1)
2395                 {
2396                         TreeServer* ServerSource = Utils->FindServer(prefix);
2397                         if (ServerSource)
2398                         {
2399                                 ServerSource->SetPingFlag();
2400                         }
2401                 }
2402                 else
2403                 {
2404                         std::string forwardto = params[1];
2405                         if (forwardto == this->Instance->Config->ServerName)
2406                         {
2407                                 /*
2408                                  * this is a PONG for us
2409                                  * if the prefix is a user, check theyre local, and if they are,
2410                                  * dump the PONG reply back to their fd. If its a server, do nowt.
2411                                  * Services might want to send these s->s, but we dont need to yet.
2412                                  */
2413                                 userrec* u = this->Instance->FindNick(prefix);
2414
2415                                 if (u)
2416                                 {
2417                                         u->WriteServ("PONG %s %s",params[0].c_str(),params[1].c_str());
2418                                 }
2419                         }
2420                         else
2421                         {
2422                                 // not for us, pass it on :)
2423                                 Utils->DoOneToOne(prefix,"PONG",params,forwardto);
2424                         }
2425                 }
2426
2427                 return true;
2428         }
2429
2430         bool MetaData(std::string prefix, std::deque<std::string> &params)
2431         {
2432                 if (params.size() < 3)
2433                         return true;
2434
2435                 TreeServer* ServerSource = Utils->FindServer(prefix);
2436
2437                 if (ServerSource)
2438                 {
2439                         if (params[0] == "*")
2440                         {
2441                                 FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_OTHER,NULL,params[1],params[2]));
2442                         }
2443                         else if (*(params[0].c_str()) == '#')
2444                         {
2445                                 chanrec* c = this->Instance->FindChan(params[0]);
2446                                 if (c)
2447                                 {
2448                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_CHANNEL,c,params[1],params[2]));
2449                                 }
2450                         }
2451                         else if (*(params[0].c_str()) != '#')
2452                         {
2453                                 userrec* u = this->Instance->FindNick(params[0]);
2454                                 if (u)
2455                                 {
2456                                         FOREACH_MOD_I(this->Instance,I_OnDecodeMetaData,OnDecodeMetaData(TYPE_USER,u,params[1],params[2]));
2457                                 }
2458                         }
2459                 }
2460
2461                 params[2] = ":" + params[2];
2462                 Utils->DoOneToAllButSender(prefix,"METADATA",params,prefix);
2463                 return true;
2464         }
2465
2466         bool ServerVersion(std::string prefix, std::deque<std::string> &params)
2467         {
2468                 if (params.size() < 1)
2469                         return true;
2470
2471                 TreeServer* ServerSource = Utils->FindServer(prefix);
2472
2473                 if (ServerSource)
2474                 {
2475                         ServerSource->SetVersion(params[0]);
2476                 }
2477                 params[0] = ":" + params[0];
2478                 Utils->DoOneToAllButSender(prefix,"VERSION",params,prefix);
2479                 return true;
2480         }
2481
2482         bool ChangeHost(std::string prefix, std::deque<std::string> &params)
2483         {
2484                 if (params.size() < 1)
2485                         return true;
2486
2487                 userrec* u = this->Instance->FindNick(prefix);
2488
2489                 if (u)
2490                 {
2491                         u->ChangeDisplayedHost(params[0].c_str());
2492                         Utils->DoOneToAllButSender(prefix,"FHOST",params,u->server);
2493                 }
2494                 return true;
2495         }
2496
2497         bool AddLine(std::string prefix, std::deque<std::string> &params)
2498         {
2499                 if (params.size() < 6)
2500                         return true;
2501
2502                 bool propogate = false;
2503
2504                 switch (*(params[0].c_str()))
2505                 {
2506                         case 'Z':
2507                                 propogate = Instance->XLines->add_zline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2508                                 Instance->XLines->zline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2509                         break;
2510                         case 'Q':
2511                                 propogate = Instance->XLines->add_qline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2512                                 Instance->XLines->qline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2513                         break;
2514                         case 'E':
2515                                 propogate = Instance->XLines->add_eline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2516                                 Instance->XLines->eline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2517                         break;
2518                         case 'G':
2519                                 propogate = Instance->XLines->add_gline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2520                                 Instance->XLines->gline_set_creation_time(params[1].c_str(), atoi(params[3].c_str()));
2521                         break;
2522                         case 'K':
2523                                 propogate = Instance->XLines->add_kline(atoi(params[4].c_str()), params[2].c_str(), params[5].c_str(), params[1].c_str());
2524                         break;
2525                         default:
2526                                 /* Just in case... */
2527                                 this->Instance->SNO->WriteToSnoMask('x',"\2WARNING\2: Invalid xline type '"+params[0]+"' sent by server "+prefix+", ignored!");
2528                                 propogate = false;
2529                         break;
2530                 }
2531
2532                 /* Send it on its way */
2533                 if (propogate)
2534                 {
2535                         if (atoi(params[4].c_str()))
2536                         {
2537                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added %cLINE on %s to expire in %lu seconds (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),atoi(params[4].c_str()),params[5].c_str());
2538                         }
2539                         else
2540                         {
2541                                 this->Instance->SNO->WriteToSnoMask('x',"%s Added permenant %cLINE on %s (%s).",prefix.c_str(),*(params[0].c_str()),params[1].c_str(),params[5].c_str());
2542                         }
2543                         params[5] = ":" + params[5];
2544                         Utils->DoOneToAllButSender(prefix,"ADDLINE",params,prefix);
2545                 }
2546                 if (!this->bursting)
2547                 {
2548                         Instance->Log(DEBUG,"Applying lines...");
2549                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
2550                 }
2551                 return true;
2552         }
2553
2554         bool ChangeName(std::string prefix, std::deque<std::string> &params)
2555         {
2556                 if (params.size() < 1)
2557                         return true;
2558
2559                 userrec* u = this->Instance->FindNick(prefix);
2560
2561                 if (u)
2562                 {
2563                         u->ChangeName(params[0].c_str());
2564                         params[0] = ":" + params[0];
2565                         Utils->DoOneToAllButSender(prefix,"FNAME",params,u->server);
2566                 }
2567                 return true;
2568         }
2569
2570         bool Whois(std::string prefix, std::deque<std::string> &params)
2571         {
2572                 if (params.size() < 1)
2573                         return true;
2574
2575                 Instance->Log(DEBUG,"In IDLE command");
2576                 userrec* u = this->Instance->FindNick(prefix);
2577
2578                 if (u)
2579                 {
2580                         Instance->Log(DEBUG,"USER EXISTS: %s",u->nick);
2581                         // an incoming request
2582                         if (params.size() == 1)
2583                         {
2584                                 userrec* x = this->Instance->FindNick(params[0]);
2585                                 if ((x) && (IS_LOCAL(x)))
2586                                 {
2587                                         userrec* x = this->Instance->FindNick(params[0]);
2588                                         char signon[MAXBUF];
2589                                         char idle[MAXBUF];
2590
2591                                         snprintf(signon,MAXBUF,"%lu",(unsigned long)x->signon);
2592                                         snprintf(idle,MAXBUF,"%lu",(unsigned long)abs((x->idle_lastmsg)-time(NULL)));
2593                                         std::deque<std::string> par;
2594                                         par.push_back(prefix);
2595                                         par.push_back(signon);
2596                                         par.push_back(idle);
2597                                         // ours, we're done, pass it BACK
2598                                         Utils->DoOneToOne(params[0],"IDLE",par,u->server);
2599                                 }
2600                                 else
2601                                 {
2602                                         // not ours pass it on
2603                                         Utils->DoOneToOne(prefix,"IDLE",params,x->server);
2604                                 }
2605                         }
2606                         else if (params.size() == 3)
2607                         {
2608                                 std::string who_did_the_whois = params[0];
2609                                 userrec* who_to_send_to = this->Instance->FindNick(who_did_the_whois);
2610                                 if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2611                                 {
2612                                         // an incoming reply to a whois we sent out
2613                                         std::string nick_whoised = prefix;
2614                                         unsigned long signon = atoi(params[1].c_str());
2615                                         unsigned long idle = atoi(params[2].c_str());
2616                                         if ((who_to_send_to) && (IS_LOCAL(who_to_send_to)))
2617                                                 do_whois(this->Instance,who_to_send_to,u,signon,idle,nick_whoised.c_str());
2618                                 }
2619                                 else
2620                                 {
2621                                         // not ours, pass it on
2622                                         Utils->DoOneToOne(prefix,"IDLE",params,who_to_send_to->server);
2623                                 }
2624                         }
2625                 }
2626                 return true;
2627         }
2628
2629         bool Push(std::string prefix, std::deque<std::string> &params)
2630         {
2631                 if (params.size() < 2)
2632                         return true;
2633
2634                 userrec* u = this->Instance->FindNick(params[0]);
2635
2636                 if (!u)
2637                         return true;
2638
2639                 if (IS_LOCAL(u))
2640                 {
2641                         u->Write(params[1]);
2642                 }
2643                 else
2644                 {
2645                         // continue the raw onwards
2646                         params[1] = ":" + params[1];
2647                         Utils->DoOneToOne(prefix,"PUSH",params,u->server);
2648                 }
2649                 return true;
2650         }
2651
2652         bool Time(std::string prefix, std::deque<std::string> &params)
2653         {
2654                 // :source.server TIME remote.server sendernick
2655                 // :remote.server TIME source.server sendernick TS
2656                 if (params.size() == 2)
2657                 {
2658                         // someone querying our time?
2659                         if (this->Instance->Config->ServerName == params[0])
2660                         {
2661                                 userrec* u = this->Instance->FindNick(params[1]);
2662                                 if (u)
2663                                 {
2664                                         char curtime[256];
2665                                         snprintf(curtime,256,"%lu",(unsigned long)time(NULL));
2666                                         params.push_back(curtime);
2667                                         params[0] = prefix;
2668                                         Utils->DoOneToOne(this->Instance->Config->ServerName,"TIME",params,params[0]);
2669                                 }
2670                         }
2671                         else
2672                         {
2673                                 // not us, pass it on
2674                                 userrec* u = this->Instance->FindNick(params[1]);
2675                                 if (u)
2676                                         Utils->DoOneToOne(prefix,"TIME",params,params[0]);
2677                         }
2678                 }
2679                 else if (params.size() == 3)
2680                 {
2681                         // a response to a previous TIME
2682                         userrec* u = this->Instance->FindNick(params[1]);
2683                         if ((u) && (IS_LOCAL(u)))
2684                         {
2685                         time_t rawtime = atol(params[2].c_str());
2686                         struct tm * timeinfo;
2687                         timeinfo = localtime(&rawtime);
2688                                 char tms[26];
2689                                 snprintf(tms,26,"%s",asctime(timeinfo));
2690                                 tms[24] = 0;
2691                         u->WriteServ("391 %s %s :%s",u->nick,prefix.c_str(),tms);
2692                         }
2693                         else
2694                         {
2695                                 if (u)
2696                                         Utils->DoOneToOne(prefix,"TIME",params,u->server);
2697                         }
2698                 }
2699                 return true;
2700         }
2701
2702         bool LocalPing(std::string prefix, std::deque<std::string> &params)
2703         {
2704                 if (params.size() < 1)
2705                         return true;
2706
2707                 if (params.size() == 1)
2708                 {
2709                         std::string stufftobounce = params[0];
2710                         this->WriteLine(std::string(":")+this->Instance->Config->ServerName+" PONG "+stufftobounce);
2711                         return true;
2712                 }
2713                 else
2714                 {
2715                         std::string forwardto = params[1];
2716                         if (forwardto == this->Instance->Config->ServerName)
2717                         {
2718                                 // this is a ping for us, send back PONG to the requesting server
2719                                 params[1] = params[0];
2720                                 params[0] = forwardto;
2721                                 Utils->DoOneToOne(forwardto,"PONG",params,params[1]);
2722                         }
2723                         else
2724                         {
2725                                 // not for us, pass it on :)
2726                                 Utils->DoOneToOne(prefix,"PING",params,forwardto);
2727                         }
2728                         return true;
2729                 }
2730         }
2731
2732         bool RemoveStatus(std::string prefix, std::deque<std::string> &params)
2733         {
2734                 if (params.size() < 1)
2735                         return true;
2736
2737                 chanrec* c = Instance->FindChan(params[0]);
2738
2739                 if (c)
2740                 {
2741                         irc::modestacker modestack(false);
2742                         CUList *ulist = c->GetUsers();
2743                         const char* y[127];
2744                         std::deque<std::string> stackresult;
2745                         std::string x;
2746
2747                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
2748                         {
2749                                 std::string modesequence = Instance->Modes->ModeString(i->second, c);
2750                                 if (modesequence.length())
2751                                 {
2752                                         Instance->Log(DEBUG,"Mode sequence = '%s'",modesequence.c_str());
2753                                         irc::spacesepstream sep(modesequence);
2754                                         std::string modeletters = sep.GetToken();
2755                                         Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2756
2757                                         while (!modeletters.empty())
2758                                         {
2759                                                 char mletter = *(modeletters.begin());
2760                                                 modestack.Push(mletter,sep.GetToken());
2761                                                 Instance->Log(DEBUG,"Push letter = '%c'",mletter);
2762                                                 modeletters.erase(modeletters.begin());
2763                                                 Instance->Log(DEBUG,"Mode letters = '%s'",modeletters.c_str());
2764                                         }
2765                                 }
2766                         }
2767
2768                         while (modestack.GetStackedLine(stackresult))
2769                         {
2770                                 Instance->Log(DEBUG,"Stacked line size %d",stackresult.size());
2771                                 stackresult.push_front(ConvToStr(c->age));
2772                                 stackresult.push_front(c->name);
2773                                 Utils->DoOneToMany(Instance->Config->ServerName, "FMODE", stackresult);
2774                                 stackresult.erase(stackresult.begin() + 1);
2775                                 Instance->Log(DEBUG,"Stacked items:");
2776                                 for (size_t z = 0; z < stackresult.size(); z++)
2777                                 {
2778                                         y[z] = stackresult[z].c_str();
2779                                         Instance->Log(DEBUG,"\tstackresult[%d]='%s'",z,stackresult[z].c_str());
2780                                 }
2781                                 userrec* n = new userrec(Instance);
2782                                 n->SetFd(FD_MAGIC_NUMBER);
2783                                 Instance->SendMode(y, stackresult.size(), n);
2784                                 delete n;
2785                         }
2786                 }
2787                 return true;
2788         }
2789
2790         bool RemoteServer(std::string prefix, std::deque<std::string> &params)
2791         {
2792                 if (params.size() < 4)
2793                         return false;
2794
2795                 std::string servername = params[0];
2796                 std::string password = params[1];
2797                 // hopcount is not used for a remote server, we calculate this ourselves
2798                 std::string description = params[3];
2799                 TreeServer* ParentOfThis = Utils->FindServer(prefix);
2800
2801                 if (!ParentOfThis)
2802                 {
2803                         this->WriteLine("ERROR :Protocol error - Introduced remote server from unknown server "+prefix);
2804                         return false;
2805                 }
2806                 TreeServer* CheckDupe = Utils->FindServer(servername);
2807                 if (CheckDupe)
2808                 {
2809                         this->WriteLine("ERROR :Server "+servername+" already exists!");
2810                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+servername+"\2 denied, already exists");
2811                         return false;
2812                 }
2813                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,servername,description,ParentOfThis,NULL);
2814                 ParentOfThis->AddChild(Node);
2815                 params[3] = ":" + params[3];
2816                 Utils->DoOneToAllButSender(prefix,"SERVER",params,prefix);
2817                 this->Instance->SNO->WriteToSnoMask('l',"Server \002"+prefix+"\002 introduced server \002"+servername+"\002 ("+description+")");
2818                 return true;
2819         }
2820
2821         bool Outbound_Reply_Server(std::deque<std::string> &params)
2822         {
2823                 if (params.size() < 4)
2824                         return false;
2825
2826                 irc::string servername = params[0].c_str();
2827                 std::string sname = params[0];
2828                 std::string password = params[1];
2829                 int hops = atoi(params[2].c_str());
2830
2831                 if (hops)
2832                 {
2833                         this->WriteLine("ERROR :Server too far away for authentication");
2834                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2835                         return false;
2836                 }
2837                 std::string description = params[3];
2838                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2839                 {
2840                         if ((x->Name == servername) && (x->RecvPass == password))
2841                         {
2842                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2843                                 if (CheckDupe)
2844                                 {
2845                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2846                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2847                                         return false;
2848                                 }
2849                                 // Begin the sync here. this kickstarts the
2850                                 // other side, waiting in WAIT_AUTH_2 state,
2851                                 // into starting their burst, as it shows
2852                                 // that we're happy.
2853                                 this->LinkState = CONNECTED;
2854                                 // we should add the details of this server now
2855                                 // to the servers tree, as a child of the root
2856                                 // node.
2857                                 TreeServer* Node = new TreeServer(this->Utils,this->Instance,sname,description,Utils->TreeRoot,this);
2858                                 Utils->TreeRoot->AddChild(Node);
2859                                 params[3] = ":" + params[3];
2860                                 Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,sname);
2861                                 this->bursting = true;
2862                                 this->DoBurst(Node);
2863                                 return true;
2864                         }
2865                 }
2866                 this->WriteLine("ERROR :Invalid credentials");
2867                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2868                 return false;
2869         }
2870
2871         bool Inbound_Server(std::deque<std::string> &params)
2872         {
2873                 if (params.size() < 4)
2874                         return false;
2875
2876                 irc::string servername = params[0].c_str();
2877                 std::string sname = params[0];
2878                 std::string password = params[1];
2879                 int hops = atoi(params[2].c_str());
2880
2881                 if (hops)
2882                 {
2883                         this->WriteLine("ERROR :Server too far away for authentication");
2884                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, server is too far away for authentication");
2885                         return false;
2886                 }
2887                 std::string description = params[3];
2888                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2889                 {
2890                         if ((x->Name == servername) && (x->RecvPass == password))
2891                         {
2892                                 TreeServer* CheckDupe = Utils->FindServer(sname);
2893                                 if (CheckDupe)
2894                                 {
2895                                         this->WriteLine("ERROR :Server "+sname+" already exists on server "+CheckDupe->GetParent()->GetName()+"!");
2896                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, already exists on server "+CheckDupe->GetParent()->GetName());
2897                                         return false;
2898                                 }
2899                                 /* If the config says this link is encrypted, but the remote side
2900                                  * hasnt bothered to send the AES command before SERVER, then we
2901                                  * boot them off as we MUST have this connection encrypted.
2902                                  */
2903                                 if ((x->EncryptionKey != "") && (!this->ctx_in))
2904                                 {
2905                                         this->WriteLine("ERROR :This link requires AES encryption to be enabled. Plaintext connection refused.");
2906                                         this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, remote server did not enable AES.");
2907                                         return false;
2908                                 }
2909                                 this->Instance->SNO->WriteToSnoMask('l',"Verified incoming server connection from \002"+sname+"\002["+(x->HiddenFromStats ? "<hidden>" : this->GetIP())+"] ("+description+")");
2910                                 this->InboundServerName = sname;
2911                                 this->InboundDescription = description;
2912                                 // this is good. Send our details: Our server name and description and hopcount of 0,
2913                                 // along with the sendpass from this block.
2914                                 this->WriteLine(std::string("SERVER ")+this->Instance->Config->ServerName+" "+x->SendPass+" 0 :"+this->Instance->Config->ServerDesc);
2915                                 // move to the next state, we are now waiting for THEM.
2916                                 this->LinkState = WAIT_AUTH_2;
2917                                 return true;
2918                         }
2919                 }
2920                 this->WriteLine("ERROR :Invalid credentials");
2921                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from \2"+sname+"\2 denied, invalid link credentials");
2922                 return false;
2923         }
2924
2925         void Split(std::string line, std::deque<std::string> &n)
2926         {
2927                 n.clear();
2928                 irc::tokenstream tokens(line);
2929                 std::string param;
2930                 while ((param = tokens.GetToken()) != "")
2931                         n.push_back(param);
2932                 return;
2933         }
2934
2935         bool ProcessLine(std::string line)
2936         {
2937                 std::deque<std::string> params;
2938                 irc::string command;
2939                 std::string prefix;
2940
2941                 if (line.empty())
2942                         return true;
2943
2944                 line = line.substr(0, line.find_first_of("\r\n"));
2945
2946                 Instance->Log(DEBUG,"IN: %s", line.c_str());
2947
2948                 this->Split(line.c_str(),params);
2949
2950                 if ((params[0][0] == ':') && (params.size() > 1))
2951                 {
2952                         prefix = params[0].substr(1);
2953                         params.pop_front();
2954                 }
2955
2956                 command = params[0].c_str();
2957                 params.pop_front();
2958
2959                 if ((!this->ctx_in) && (command == "AES"))
2960                 {
2961                         std::string sserv = params[0];
2962                         for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
2963                         {
2964                                 if ((x->EncryptionKey != "") && (x->Name == sserv))
2965                                 {
2966                                         this->InitAES(x->EncryptionKey,sserv);
2967                                 }
2968                         }
2969
2970                         return true;
2971                 }
2972                 else if ((this->ctx_in) && (command == "AES"))
2973                 {
2974                         this->Instance->SNO->WriteToSnoMask('l',"\2AES\2: Encryption already enabled on this connection yet %s is trying to enable it twice!",params[0].c_str());
2975                 }
2976
2977                 switch (this->LinkState)
2978                 {
2979                         TreeServer* Node;
2980
2981                         case WAIT_AUTH_1:
2982                                 // Waiting for SERVER command from remote server. Server initiating
2983                                 // the connection sends the first SERVER command, listening server
2984                                 // replies with theirs if its happy, then if the initiator is happy,
2985                                 // it starts to send its net sync, which starts the merge, otherwise
2986                                 // it sends an ERROR.
2987                                 if (command == "PASS")
2988                                 {
2989                                         /* Silently ignored */
2990                                 }
2991                                 else if (command == "SERVER")
2992                                 {
2993                                         return this->Inbound_Server(params);
2994                                 }
2995                                 else if (command == "ERROR")
2996                                 {
2997                                         return this->Error(params);
2998                                 }
2999                                 else if (command == "USER")
3000                                 {
3001                                         this->WriteLine("ERROR :Client connections to this port are prohibited.");
3002                                         return false;
3003                                 }
3004                                 else if (command == "CAPAB")
3005                                 {
3006                                         return this->Capab(params);
3007                                 }
3008                                 else if ((command == "U") || (command == "S"))
3009                                 {
3010                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3011                                         return false;
3012                                 }
3013                                 else
3014                                 {
3015                                         std::string error("ERROR :Invalid command in negotiation phase: ");
3016                                         error.append(command.c_str());
3017                                         this->WriteLine(error);
3018                                         return false;
3019                                 }
3020                         break;
3021                         case WAIT_AUTH_2:
3022                                 // Waiting for start of other side's netmerge to say they liked our
3023                                 // password.
3024                                 if (command == "SERVER")
3025                                 {
3026                                         // cant do this, they sent it to us in the WAIT_AUTH_1 state!
3027                                         // silently ignore.
3028                                         return true;
3029                                 }
3030                                 else if ((command == "U") || (command == "S"))
3031                                 {
3032                                         this->WriteLine("ERROR :Cannot use the old-style mesh linking protocol with m_spanningtree.so!");
3033                                         return false;
3034                                 }
3035                                 else if (command == "BURST")
3036                                 {
3037                                         if (params.size())
3038                                         {
3039                                                 /* If a time stamp is provided, try and check syncronization */
3040                                                 time_t THEM = atoi(params[0].c_str());
3041                                                 long delta = THEM-time(NULL);
3042                                                 if ((delta < -600) || (delta > 600))
3043                                                 {
3044                                                         this->Instance->SNO->WriteToSnoMask('l',"\2ERROR\2: Your clocks are out by %d seconds (this is more than ten minutes). Link aborted, \2PLEASE SYNC YOUR CLOCKS!\2",abs(delta));
3045                                                         this->WriteLine("ERROR :Your clocks are out by "+ConvToStr(abs(delta))+" seconds (this is more than ten minutes). Link aborted, PLEASE SYNC YOUR CLOCKS!");
3046                                                         return false;
3047                                                 }
3048                                                 else if ((delta < -60) || (delta > 60))
3049                                                 {
3050                                                         this->Instance->SNO->WriteToSnoMask('l',"\2WARNING\2: Your clocks are out by %d seconds, please consider synching your clocks.",abs(delta));
3051                                                 }
3052                                         }
3053                                         this->LinkState = CONNECTED;
3054                                         Node = new TreeServer(this->Utils,this->Instance,InboundServerName,InboundDescription,Utils->TreeRoot,this);
3055                                         Utils->TreeRoot->AddChild(Node);
3056                                         params.clear();
3057                                         params.push_back(InboundServerName);
3058                                         params.push_back("*");
3059                                         params.push_back("1");
3060                                         params.push_back(":"+InboundDescription);
3061                                         Utils->DoOneToAllButSender(Utils->TreeRoot->GetName(),"SERVER",params,InboundServerName);
3062                                         this->bursting = true;
3063                                         this->DoBurst(Node);
3064                                 }
3065                                 else if (command == "ERROR")
3066                                 {
3067                                         return this->Error(params);
3068                                 }
3069                                 else if (command == "CAPAB")
3070                                 {
3071                                         return this->Capab(params);
3072                                 }
3073
3074                         break;
3075                         case LISTENER:
3076                                 this->WriteLine("ERROR :Internal error -- listening socket accepted its own descriptor!!!");
3077                                 return false;
3078                         break;
3079                         case CONNECTING:
3080                                 if (command == "SERVER")
3081                                 {
3082                                         // another server we connected to, which was in WAIT_AUTH_1 state,
3083                                         // has just sent us their credentials. If we get this far, theyre
3084                                         // happy with OUR credentials, and they are now in WAIT_AUTH_2 state.
3085                                         // if we're happy with this, we should send our netburst which
3086                                         // kickstarts the merge.
3087                                         return this->Outbound_Reply_Server(params);
3088                                 }
3089                                 else if (command == "ERROR")
3090                                 {
3091                                         return this->Error(params);
3092                                 }
3093                         break;
3094                         case CONNECTED:
3095                                 // This is the 'authenticated' state, when all passwords
3096                                 // have been exchanged and anything past this point is taken
3097                                 // as gospel.
3098
3099                                 if (prefix != "")
3100                                 {
3101                                         std::string direction = prefix;
3102                                         userrec* t = this->Instance->FindNick(prefix);
3103                                         if (t)
3104                                         {
3105                                                 direction = t->server;
3106                                         }
3107                                         TreeServer* route_back_again = Utils->BestRouteTo(direction);
3108                                         if ((!route_back_again) || (route_back_again->GetSocket() != this))
3109                                         {
3110                                                 if (route_back_again)
3111                                                         Instance->Log(DEBUG,"Protocol violation: Fake direction in command '%s' from connection '%s'",line.c_str(),this->GetName().c_str());
3112                                                 return true;
3113                                         }
3114
3115                                         /* Fix by brain:
3116                                          * When there is activity on the socket, reset the ping counter so
3117                                          * that we're not wasting bandwidth pinging an active server.
3118                                          */
3119                                         route_back_again->SetNextPingTime(time(NULL) + 60);
3120                                         route_back_again->SetPingFlag();
3121                                 }
3122
3123                                 if (command == "SVSMODE")
3124                                 {
3125                                         /* Services expects us to implement
3126                                          * SVSMODE. In inspircd its the same as
3127                                          * MODE anyway.
3128                                          */
3129                                         command = "MODE";
3130                                 }
3131                                 std::string target = "";
3132                                 /* Yes, know, this is a mess. Its reasonably fast though as we're
3133                                  * working with std::string here.
3134                                  */
3135                                 if ((command == "NICK") && (params.size() > 1))
3136                                 {
3137                                         return this->IntroduceClient(prefix,params);
3138                                 }
3139                                 else if (command == "FJOIN")
3140                                 {
3141                                         return this->ForceJoin(prefix,params);
3142                                 }
3143                                 else if (command == "STATS")
3144                                 {
3145                                         return this->Stats(prefix, params);
3146                                 }
3147                                 else if (command == "MOTD")
3148                                 {
3149                                         return this->Motd(prefix, params);
3150                                 }
3151                                 else if (command == "ADMIN")
3152                                 {
3153                                         return this->Admin(prefix, params);
3154                                 }
3155                                 else if (command == "SERVER")
3156                                 {
3157                                         return this->RemoteServer(prefix,params);
3158                                 }
3159                                 else if (command == "ERROR")
3160                                 {
3161                                         return this->Error(params);
3162                                 }
3163                                 else if (command == "OPERTYPE")
3164                                 {
3165                                         return this->OperType(prefix,params);
3166                                 }
3167                                 else if (command == "FMODE")
3168                                 {
3169                                         return this->ForceMode(prefix,params);
3170                                 }
3171                                 else if (command == "KILL")
3172                                 {
3173                                         return this->RemoteKill(prefix,params);
3174                                 }
3175                                 else if (command == "FTOPIC")
3176                                 {
3177                                         return this->ForceTopic(prefix,params);
3178                                 }
3179                                 else if (command == "REHASH")
3180                                 {
3181                                         return this->RemoteRehash(prefix,params);
3182                                 }
3183                                 else if (command == "METADATA")
3184                                 {
3185                                         return this->MetaData(prefix,params);
3186                                 }
3187                                 else if (command == "REMSTATUS")
3188                                 {
3189                                         return this->RemoveStatus(prefix,params);
3190                                 }
3191                                 else if (command == "PING")
3192                                 {
3193                                         /*
3194                                          * We just got a ping from a server that's bursting.
3195                                          * This can't be right, so set them to not bursting, and
3196                                          * apply their lines.
3197                                          */
3198                                         if (this->bursting)
3199                                         {
3200                                                 this->bursting = false;
3201                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3202                                         }
3203                                         if (prefix == "")
3204                                         {
3205                                                 prefix = this->GetName();
3206                                         }
3207                                         return this->LocalPing(prefix,params);
3208                                 }
3209                                 else if (command == "PONG")
3210                                 {
3211                                         /*
3212                                          * We just got a pong from a server that's bursting.
3213                                          * This can't be right, so set them to not bursting, and
3214                                          * apply their lines.
3215                                          */
3216                                         if (this->bursting)
3217                                         {
3218                                                 this->bursting = false;
3219                                                 Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3220                                         }
3221                                         if (prefix == "")
3222                                         {
3223                                                 prefix = this->GetName();
3224                                         }
3225                                         return this->LocalPong(prefix,params);
3226                                 }
3227                                 else if (command == "VERSION")
3228                                 {
3229                                         return this->ServerVersion(prefix,params);
3230                                 }
3231                                 else if (command == "FHOST")
3232                                 {
3233                                         return this->ChangeHost(prefix,params);
3234                                 }
3235                                 else if (command == "FNAME")
3236                                 {
3237                                         return this->ChangeName(prefix,params);
3238                                 }
3239                                 else if (command == "ADDLINE")
3240                                 {
3241                                         return this->AddLine(prefix,params);
3242                                 }
3243                                 else if (command == "SVSNICK")
3244                                 {
3245                                         if (prefix == "")
3246                                         {
3247                                                 prefix = this->GetName();
3248                                         }
3249                                         return this->ForceNick(prefix,params);
3250                                 }
3251                                 else if (command == "IDLE")
3252                                 {
3253                                         return this->Whois(prefix,params);
3254                                 }
3255                                 else if (command == "PUSH")
3256                                 {
3257                                         return this->Push(prefix,params);
3258                                 }
3259                                 else if (command == "TIME")
3260                                 {
3261                                         return this->Time(prefix,params);
3262                                 }
3263                                 else if ((command == "KICK") && (Utils->IsServer(prefix)))
3264                                 {
3265                                         std::string sourceserv = this->myhost;
3266                                         if (params.size() == 3)
3267                                         {
3268                                                 userrec* user = this->Instance->FindNick(params[1]);
3269                                                 chanrec* chan = this->Instance->FindChan(params[0]);
3270                                                 if (user && chan)
3271                                                 {
3272                                                         if (!chan->ServerKickUser(user, params[2].c_str(), false))
3273                                                                 /* Yikes, the channels gone! */
3274                                                                 delete chan;
3275                                                 }
3276                                         }
3277                                         if (this->InboundServerName != "")
3278                                         {
3279                                                 sourceserv = this->InboundServerName;
3280                                         }
3281                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3282                                 }
3283                                 else if (command == "SVSJOIN")
3284                                 {
3285                                         if (prefix == "")
3286                                         {
3287                                                 prefix = this->GetName();
3288                                         }
3289                                         return this->ServiceJoin(prefix,params);
3290                                 }
3291                                 else if (command == "SQUIT")
3292                                 {
3293                                         if (params.size() == 2)
3294                                         {
3295                                                 this->Squit(Utils->FindServer(params[0]),params[1]);
3296                                         }
3297                                         return true;
3298                                 }
3299                                 else if (command == "ENDBURST")
3300                                 {
3301                                         this->bursting = false;
3302                                         Instance->XLines->apply_lines(APPLY_ZLINES|APPLY_GLINES|APPLY_QLINES);
3303                                         std::string sourceserv = this->myhost;
3304                                         if (this->InboundServerName != "")
3305                                         {
3306                                                 sourceserv = this->InboundServerName;
3307                                         }
3308                                         this->Instance->SNO->WriteToSnoMask('l',"Received end of netburst from \2%s\2",sourceserv.c_str());
3309                                         return true;
3310                                 }
3311                                 else
3312                                 {
3313                                         // not a special inter-server command.
3314                                         // Emulate the actual user doing the command,
3315                                         // this saves us having a huge ugly parser.
3316                                         userrec* who = this->Instance->FindNick(prefix);
3317                                         std::string sourceserv = this->myhost;
3318                                         if (this->InboundServerName != "")
3319                                         {
3320                                                 sourceserv = this->InboundServerName;
3321                                         }
3322                                         if (who)
3323                                         {
3324                                                 if ((command == "NICK") && (params.size() > 0))
3325                                                 {
3326                                                         /* On nick messages, check that the nick doesnt
3327                                                          * already exist here. If it does, kill their copy,
3328                                                          * and our copy.
3329                                                          */
3330                                                         userrec* x = this->Instance->FindNick(params[0]);
3331                                                         if ((x) && (x != who))
3332                                                         {
3333                                                                 std::deque<std::string> p;
3334                                                                 p.push_back(params[0]);
3335                                                                 p.push_back("Nickname collision ("+prefix+" -> "+params[0]+")");
3336                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3337                                                                 p.clear();
3338                                                                 p.push_back(prefix);
3339                                                                 p.push_back("Nickname collision");
3340                                                                 Utils->DoOneToMany(this->Instance->Config->ServerName,"KILL",p);
3341                                                                 userrec::QuitUser(this->Instance,x,"Nickname collision ("+prefix+" -> "+params[0]+")");
3342                                                                 userrec* y = this->Instance->FindNick(prefix);
3343                                                                 if (y)
3344                                                                 {
3345                                                                         userrec::QuitUser(this->Instance,y,"Nickname collision");
3346                                                                 }
3347                                                                 return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3348                                                         }
3349                                                 }
3350                                                 // its a user
3351                                                 target = who->server;
3352                                                 const char* strparams[127];
3353                                                 for (unsigned int q = 0; q < params.size(); q++)
3354                                                 {
3355                                                         strparams[q] = params[q].c_str();
3356                                                 }
3357                                                 switch (this->Instance->CallCommandHandler(command.c_str(), strparams, params.size(), who))
3358                                                 {
3359                                                         case CMD_INVALID:
3360                                                                 this->WriteLine("ERROR :Unrecognised command '"+std::string(command.c_str())+"' -- possibly loaded mismatched modules");
3361                                                                 return false;
3362                                                         break;
3363                                                         case CMD_FAILURE:
3364                                                                 return true;
3365                                                         break;
3366                                                         default:
3367                                                                 /* CMD_SUCCESS and CMD_USER_DELETED fall through here */
3368                                                         break;
3369                                                 }
3370                                         }
3371                                         else
3372                                         {
3373                                                 // its not a user. Its either a server, or somethings screwed up.
3374                                                 if (Utils->IsServer(prefix))
3375                                                 {
3376                                                         target = this->Instance->Config->ServerName;
3377                                                 }
3378                                                 else
3379                                                 {
3380                                                         Instance->Log(DEBUG,"Command with unknown origin '%s'",prefix.c_str());
3381                                                         return true;
3382                                                 }
3383                                         }
3384                                         return Utils->DoOneToAllButSenderRaw(line,sourceserv,prefix,command,params);
3385
3386                                 }
3387                                 return true;
3388                         break;
3389                 }
3390                 return true;
3391         }
3392
3393         virtual std::string GetName()
3394         {
3395                 std::string sourceserv = this->myhost;
3396                 if (this->InboundServerName != "")
3397                 {
3398                         sourceserv = this->InboundServerName;
3399                 }
3400                 return sourceserv;
3401         }
3402
3403         virtual void OnTimeout()
3404         {
3405                 if (this->LinkState == CONNECTING)
3406                 {
3407                         this->Instance->SNO->WriteToSnoMask('l',"CONNECT: Connection to \002"+myhost+"\002 timed out.");
3408                         Link* MyLink = Utils->FindLink(myhost);
3409                         if (MyLink)
3410                                 Utils->DoFailOver(MyLink);
3411                 }
3412         }
3413
3414         virtual void OnClose()
3415         {
3416                 // Connection closed.
3417                 // If the connection is fully up (state CONNECTED)
3418                 // then propogate a netsplit to all peers.
3419                 std::string quitserver = this->myhost;
3420                 if (this->InboundServerName != "")
3421                 {
3422                         quitserver = this->InboundServerName;
3423                 }
3424                 TreeServer* s = Utils->FindServer(quitserver);
3425                 if (s)
3426                 {
3427                         Squit(s,"Remote host closed the connection");
3428                 }
3429                 this->Instance->SNO->WriteToSnoMask('l',"Connection to '\2%s\2' failed.",quitserver.c_str());
3430         }
3431
3432         virtual int OnIncomingConnection(int newsock, char* ip)
3433         {
3434                 /* To prevent anyone from attempting to flood opers/DDoS by connecting to the server port,
3435                  * or discovering if this port is the server port, we don't allow connections from any
3436                  * IPs for which we don't have a link block.
3437                  */
3438                 bool found = false;
3439
3440                 found = (std::find(Utils->ValidIPs.begin(), Utils->ValidIPs.end(), ip) != Utils->ValidIPs.end());
3441                 if (!found)
3442                 {
3443                         for (vector<std::string>::iterator i = Utils->ValidIPs.begin(); i != Utils->ValidIPs.end(); i++)
3444                                 if (irc::sockets::MatchCIDR(ip, (*i).c_str()))
3445                                         found = true;
3446
3447                         if (!found)
3448                         {
3449                                 this->Instance->SNO->WriteToSnoMask('l',"Server connection from %s denied (no link blocks with that IP address)", ip);
3450                                 close(newsock);
3451                                 return false;
3452                         }
3453                 }
3454                 TreeSocket* s = new TreeSocket(this->Utils, this->Instance, newsock, ip);
3455                 s = s; /* Whinge whinge whinge, thats all GCC ever does. */
3456                 return true;
3457         }
3458 };
3459
3460 /** This class is used to resolve server hostnames during /connect and autoconnect.
3461  * As of 1.1, the resolver system is seperated out from InspSocket, so we must do this
3462  * resolver step first ourselves if we need it. This is totally nonblocking, and will
3463  * callback to OnLookupComplete or OnError when completed. Once it has completed we
3464  * will have an IP address which we can then use to continue our connection.
3465  */
3466 class ServernameResolver : public Resolver
3467 {
3468  private:
3469         /** A copy of the Link tag info for what we're connecting to.
3470          * We take a copy, rather than using a pointer, just in case the
3471          * admin takes the tag away and rehashes while the domain is resolving.
3472          */
3473         Link MyLink;
3474         SpanningTreeUtilities* Utils;
3475  public:
3476         ServernameResolver(SpanningTreeUtilities* Util, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(Util)
3477         {
3478                 /* Nothing in here, folks */
3479         }
3480
3481         void OnLookupComplete(const std::string &result)
3482         {
3483                 /* Initiate the connection, now that we have an IP to use.
3484                  * Passing a hostname directly to InspSocket causes it to
3485                  * just bail and set its FD to -1.
3486                  */
3487                 TreeServer* CheckDupe = Utils->FindServer(MyLink.Name.c_str());
3488                 if (!CheckDupe) /* Check that nobody tried to connect it successfully while we were resolving */
3489                 {
3490                         TreeSocket* newsocket = new TreeSocket(this->Utils, ServerInstance, result,MyLink.Port,false,10,MyLink.Name.c_str());
3491                         if (newsocket->GetFd() > -1)
3492                         {
3493                                 /* We're all OK */
3494                         }
3495                         else
3496                         {
3497                                 /* Something barfed, show the opers */
3498                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",MyLink.Name.c_str(),strerror(errno));
3499                                 delete newsocket;
3500                                 Utils->DoFailOver(&MyLink);
3501                         }
3502                 }
3503         }
3504
3505         void OnError(ResolverError e, const std::string &errormessage)
3506         {
3507                 /* Ooops! */
3508                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: Unable to resolve hostname - %s",MyLink.Name.c_str(),errormessage.c_str());
3509                 Utils->DoFailOver(&MyLink);
3510         }
3511 };
3512
3513 /** Handle resolving of server IPs for the cache
3514  */
3515 class SecurityIPResolver : public Resolver
3516 {
3517  private:
3518         Link MyLink;
3519         SpanningTreeUtilities* Utils;
3520  public:
3521         SecurityIPResolver(SpanningTreeUtilities* U, InspIRCd* Instance, const std::string &hostname, Link x) : Resolver(Instance, hostname, DNS_QUERY_FORWARD), MyLink(x), Utils(U)
3522         {
3523         }
3524
3525         void OnLookupComplete(const std::string &result)
3526         {
3527                 ServerInstance->Log(DEBUG,"Security IP cache: Adding IP address '%s' for Link '%s'",result.c_str(),MyLink.Name.c_str());
3528                 Utils->ValidIPs.push_back(result);
3529         }
3530
3531         void OnError(ResolverError e, const std::string &errormessage)
3532         {
3533                 ServerInstance->Log(DEBUG,"Could not resolve IP associated with Link '%s': %s",MyLink.Name.c_str(),errormessage.c_str());
3534         }
3535 };
3536
3537 SpanningTreeUtilities::SpanningTreeUtilities(InspIRCd* Instance, ModuleSpanningTree* C) : ServerInstance(Instance), Creator(C)
3538 {
3539         Bindings.clear();
3540         this->TreeRoot = new TreeServer(this, ServerInstance, ServerInstance->Config->ServerName, ServerInstance->Config->ServerDesc);
3541         this->ReadConfiguration(true);
3542 }
3543
3544 SpanningTreeUtilities::~SpanningTreeUtilities()
3545 {
3546         for (unsigned int i = 0; i < Bindings.size(); i++)
3547         {
3548                 ServerInstance->Log(DEBUG,"Freeing binding %d of %d",i, Bindings.size());
3549                 ServerInstance->SE->DelFd(Bindings[i]);
3550                 Bindings[i]->Close();
3551                 DELETE(Bindings[i]);
3552         }
3553         ServerInstance->Log(DEBUG,"Freeing connected servers...");
3554         while (TreeRoot->ChildCount())
3555         {
3556                 TreeServer* child_server = TreeRoot->GetChild(0);
3557                 ServerInstance->Log(DEBUG,"Freeing connected server %s", child_server->GetName().c_str());
3558                 if (child_server)
3559                 {
3560                         TreeSocket* sock = child_server->GetSocket();
3561                         ServerInstance->SE->DelFd(sock);
3562                         sock->Close();
3563                         DELETE(sock);
3564                 }
3565         }
3566 }
3567
3568 void SpanningTreeUtilities::AddThisServer(TreeServer* server, std::deque<TreeServer*> &list)
3569 {
3570         for (unsigned int c = 0; c < list.size(); c++)
3571         {
3572                 if (list[c] == server)
3573                 {
3574                         return;
3575                 }
3576         }
3577         list.push_back(server);
3578 }
3579
3580 /** returns a list of DIRECT servernames for a specific channel */
3581 void SpanningTreeUtilities::GetListOfServersForChannel(chanrec* c, std::deque<TreeServer*> &list)
3582 {
3583         CUList *ulist = c->GetUsers();
3584         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
3585         {
3586                 if (i->second->GetFd() < 0)
3587                 {
3588                         TreeServer* best = this->BestRouteTo(i->second->server);
3589                         if (best)
3590                                 AddThisServer(best,list);
3591                 }
3592         }
3593         return;
3594 }
3595
3596 bool SpanningTreeUtilities::DoOneToAllButSenderRaw(std::string data, std::string omit, std::string prefix, irc::string command, std::deque<std::string> &params)
3597 {
3598         TreeServer* omitroute = this->BestRouteTo(omit);
3599         if ((command == "NOTICE") || (command == "PRIVMSG"))
3600         {
3601                 if (params.size() >= 2)
3602                 {
3603                         /* Prefixes */
3604                         if ((*(params[0].c_str()) == '@') || (*(params[0].c_str()) == '%') || (*(params[0].c_str()) == '+'))
3605                         {
3606                                 params[0] = params[0].substr(1, params[0].length()-1);
3607                         }
3608                         if ((*(params[0].c_str()) != '#') && (*(params[0].c_str()) != '$'))
3609                         {
3610                                 // special routing for private messages/notices
3611                                 userrec* d = ServerInstance->FindNick(params[0]);
3612                                 if (d)
3613                                 {
3614                                         std::deque<std::string> par;
3615                                         par.push_back(params[0]);
3616                                         par.push_back(":"+params[1]);
3617                                         this->DoOneToOne(prefix,command.c_str(),par,d->server);
3618                                         return true;
3619                                 }
3620                         }
3621                         else if (*(params[0].c_str()) == '$')
3622                         {
3623                                 std::deque<std::string> par;
3624                                 par.push_back(params[0]);
3625                                 par.push_back(":"+params[1]);
3626                                 this->DoOneToAllButSender(prefix,command.c_str(),par,omitroute->GetName());
3627                                 return true;
3628                         }
3629                         else
3630                         {
3631                                 chanrec* c = ServerInstance->FindChan(params[0]);
3632                                 if (c)
3633                                 {
3634                                         std::deque<TreeServer*> list;
3635                                         GetListOfServersForChannel(c,list);
3636                                         unsigned int lsize = list.size();
3637                                         for (unsigned int i = 0; i < lsize; i++)
3638                                         {
3639                                                 TreeSocket* Sock = list[i]->GetSocket();
3640                                                 if ((Sock) && (list[i]->GetName() != omit) && (omitroute != list[i]))
3641                                                 {
3642                                                         Sock->WriteLine(data);
3643                                                 }
3644                                         }
3645                                         return true;
3646                                 }
3647                         }
3648                 }
3649         }
3650         unsigned int items =this->TreeRoot->ChildCount();
3651         for (unsigned int x = 0; x < items; x++)
3652         {
3653                 TreeServer* Route = this->TreeRoot->GetChild(x);
3654                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3655                 {
3656                         TreeSocket* Sock = Route->GetSocket();
3657                         if (Sock)
3658                                 Sock->WriteLine(data);
3659                 }
3660         }
3661         return true;
3662 }
3663
3664 bool SpanningTreeUtilities::DoOneToAllButSender(std::string prefix, std::string command, std::deque<std::string> &params, std::string omit)
3665 {
3666         TreeServer* omitroute = this->BestRouteTo(omit);
3667         std::string FullLine = ":" + prefix + " " + command;
3668         unsigned int words = params.size();
3669         for (unsigned int x = 0; x < words; x++)
3670         {
3671                 FullLine = FullLine + " " + params[x];
3672         }
3673         unsigned int items = this->TreeRoot->ChildCount();
3674         for (unsigned int x = 0; x < items; x++)
3675         {
3676                 TreeServer* Route = this->TreeRoot->GetChild(x);
3677                 // Send the line IF:
3678                 // The route has a socket (its a direct connection)
3679                 // The route isnt the one to be omitted
3680                 // The route isnt the path to the one to be omitted
3681                 if ((Route) && (Route->GetSocket()) && (Route->GetName() != omit) && (omitroute != Route))
3682                 {
3683                         TreeSocket* Sock = Route->GetSocket();
3684                         if (Sock)
3685                                 Sock->WriteLine(FullLine);
3686                 }
3687         }
3688         return true;
3689 }
3690
3691 bool SpanningTreeUtilities::DoOneToMany(std::string prefix, std::string command, std::deque<std::string> &params)
3692 {
3693         std::string FullLine = ":" + prefix + " " + command;
3694         unsigned int words = params.size();
3695         for (unsigned int x = 0; x < words; x++)
3696         {
3697                 FullLine = FullLine + " " + params[x];
3698         }
3699         unsigned int items = this->TreeRoot->ChildCount();
3700         for (unsigned int x = 0; x < items; x++)
3701         {
3702                 TreeServer* Route = this->TreeRoot->GetChild(x);
3703                 if (Route && Route->GetSocket())
3704                 {
3705                         TreeSocket* Sock = Route->GetSocket();
3706                         if (Sock)
3707                                 Sock->WriteLine(FullLine);
3708                 }
3709         }
3710         return true;
3711 }
3712
3713 bool SpanningTreeUtilities::DoOneToMany(const char* prefix, const char* command, std::deque<std::string> &params)
3714 {
3715         std::string spfx = prefix;
3716         std::string scmd = command;
3717         return this->DoOneToMany(spfx, scmd, params);
3718 }
3719
3720 bool SpanningTreeUtilities::DoOneToAllButSender(const char* prefix, const char* command, std::deque<std::string> &params, std::string omit)
3721 {
3722         std::string spfx = prefix;
3723         std::string scmd = command;
3724         return this->DoOneToAllButSender(spfx, scmd, params, omit);
3725 }
3726
3727 bool SpanningTreeUtilities::DoOneToOne(std::string prefix, std::string command, std::deque<std::string> &params, std::string target)
3728 {
3729         TreeServer* Route = this->BestRouteTo(target);
3730         if (Route)
3731         {
3732                 std::string FullLine = ":" + prefix + " " + command;
3733                 unsigned int words = params.size();
3734                 for (unsigned int x = 0; x < words; x++)
3735                 {
3736                         FullLine = FullLine + " " + params[x];
3737                 }
3738                 if (Route && Route->GetSocket())
3739                 {
3740                         TreeSocket* Sock = Route->GetSocket();
3741                         if (Sock)
3742                                 Sock->WriteLine(FullLine);
3743                 }
3744                 return true;
3745         }
3746         else
3747         {
3748                 return false;
3749         }
3750 }
3751
3752 void SpanningTreeUtilities::ReadConfiguration(bool rebind)
3753 {
3754         ConfigReader* Conf = new ConfigReader(ServerInstance);
3755         if (rebind)
3756         {
3757                 for (int j =0; j < Conf->Enumerate("bind"); j++)
3758                 {
3759                         std::string Type = Conf->ReadValue("bind","type",j);
3760                         std::string IP = Conf->ReadValue("bind","address",j);
3761                         int Port = Conf->ReadInteger("bind","port",j,true);
3762                         if (Type == "servers")
3763                         {
3764                                 ServerInstance->Log(DEBUG,"m_spanningtree: Binding server port %s:%d", IP.c_str(), Port);
3765                                 if (IP == "*")
3766                                 {
3767                                         IP = "";
3768                                 }
3769                                 TreeSocket* listener = new TreeSocket(this, ServerInstance, IP.c_str(),Port,true,10);
3770                                 if (listener->GetState() == I_LISTENING)
3771                                 {
3772                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Binding server port %s:%d successful!", IP.c_str(), Port);
3773                                         Bindings.push_back(listener);
3774                                 }
3775                                 else
3776                                 {
3777                                         ServerInstance->Log(DEFAULT,"m_spanningtree: Warning: Failed to bind server port %d",Port);
3778                                         listener->Close();
3779                                         DELETE(listener);
3780                                 }
3781                                 ServerInstance->Log(DEBUG,"Done with this binding");
3782                         }
3783                 }
3784         }
3785         FlatLinks = Conf->ReadFlag("options","flatlinks",0);
3786         HideULines = Conf->ReadFlag("options","hideulines",0);
3787         AnnounceTSChange = Conf->ReadFlag("options","announcets",0);
3788         LinkBlocks.clear();
3789         ValidIPs.clear();
3790         for (int j =0; j < Conf->Enumerate("link"); j++)
3791         {
3792                 Link L;
3793                 std::string Allow = Conf->ReadValue("link","allowmask",j);
3794                 L.Name = (Conf->ReadValue("link","name",j)).c_str();
3795                 L.IPAddr = Conf->ReadValue("link","ipaddr",j);
3796                 L.FailOver = Conf->ReadValue("link","failover",j).c_str();
3797                 L.Port = Conf->ReadInteger("link","port",j,true);
3798                 L.SendPass = Conf->ReadValue("link","sendpass",j);
3799                 L.RecvPass = Conf->ReadValue("link","recvpass",j);
3800                 L.AutoConnect = Conf->ReadInteger("link","autoconnect",j,true);
3801                 L.EncryptionKey =  Conf->ReadValue("link","encryptionkey",j);
3802                 L.HiddenFromStats = Conf->ReadFlag("link","hidden",j);
3803                 L.NextConnectTime = time(NULL) + L.AutoConnect;
3804                 /* Bugfix by brain, do not allow people to enter bad configurations */
3805                 if (L.Name != ServerInstance->Config->ServerName)
3806                 {
3807                         if ((L.IPAddr != "") && (L.RecvPass != "") && (L.SendPass != "") && (L.Name != "") && (L.Port))
3808                         {
3809                                 ValidIPs.push_back(L.IPAddr);
3810
3811                                 if (Allow.length())
3812                                         ValidIPs.push_back(Allow);
3813
3814                                 /* Needs resolving */
3815                                 insp_inaddr binip;
3816                                 if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
3817                                 {
3818                                         try
3819                                         {
3820                                                 SecurityIPResolver* sr = new SecurityIPResolver(this, ServerInstance, L.IPAddr, L);
3821                                                 ServerInstance->AddResolver(sr);
3822                                         }
3823                                         catch (ModuleException& e)
3824                                         {
3825                                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
3826                                         }
3827                                 }
3828
3829                                 LinkBlocks.push_back(L);
3830                                 ServerInstance->Log(DEBUG,"m_spanningtree: Read server %s with host %s:%d",L.Name.c_str(),L.IPAddr.c_str(),L.Port);
3831                         }
3832                         else
3833                         {
3834                                 if (L.IPAddr == "")
3835                                 {
3836                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', IP address not defined!",L.Name.c_str());
3837                                 }
3838                                 else if (L.RecvPass == "")
3839                                 {
3840                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', recvpass not defined!",L.Name.c_str());
3841                                 }
3842                                 else if (L.SendPass == "")
3843                                 {
3844                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', sendpass not defined!",L.Name.c_str());
3845                                 }
3846                                 else if (L.Name == "")
3847                                 {
3848                                         ServerInstance->Log(DEFAULT,"Invalid configuration, link tag without a name!");
3849                                 }
3850                                 else if (!L.Port)
3851                                 {
3852                                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', no port specified!",L.Name.c_str());
3853                                 }
3854                         }
3855                 }
3856                 else
3857                 {
3858                         ServerInstance->Log(DEFAULT,"Invalid configuration for server '%s', link tag has the same server name as the local server!",L.Name.c_str());
3859                 }
3860         }
3861         DELETE(Conf);
3862 }
3863
3864
3865
3866 class ModuleSpanningTree : public Module
3867 {
3868         int line;
3869         int NumServers;
3870         unsigned int max_local;
3871         unsigned int max_global;
3872         cmd_rconnect* command_rconnect;
3873         SpanningTreeUtilities* Utils;
3874
3875  public:
3876
3877         ModuleSpanningTree(InspIRCd* Me)
3878                 : Module::Module(Me), max_local(0), max_global(0)
3879         {
3880                 Utils = new SpanningTreeUtilities(Me, this);
3881
3882                 command_rconnect = new cmd_rconnect(ServerInstance, this, Utils);
3883                 ServerInstance->AddCommand(command_rconnect);
3884         }
3885
3886         void ShowLinks(TreeServer* Current, userrec* user, int hops)
3887         {
3888                 std::string Parent = Utils->TreeRoot->GetName();
3889                 if (Current->GetParent())
3890                 {
3891                         Parent = Current->GetParent()->GetName();
3892                 }
3893                 for (unsigned int q = 0; q < Current->ChildCount(); q++)
3894                 {
3895                         if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3896                         {
3897                                 if (*user->oper)
3898                                 {
3899                                          ShowLinks(Current->GetChild(q),user,hops+1);
3900                                 }
3901                         }
3902                         else
3903                         {
3904                                 ShowLinks(Current->GetChild(q),user,hops+1);
3905                         }
3906                 }
3907                 /* Don't display the line if its a uline, hide ulines is on, and the user isnt an oper */
3908                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetName().c_str())) && (!*user->oper))
3909                         return;
3910                 user->WriteServ("364 %s %s %s :%d %s",user->nick,Current->GetName().c_str(),(Utils->FlatLinks && (!*user->oper)) ? ServerInstance->Config->ServerName : Parent.c_str(),(Utils->FlatLinks && (!*user->oper)) ? 0 : hops,Current->GetDesc().c_str());
3911         }
3912
3913         int CountLocalServs()
3914         {
3915                 return Utils->TreeRoot->ChildCount();
3916         }
3917
3918         int CountServs()
3919         {
3920                 return Utils->serverlist.size();
3921         }
3922
3923         void HandleLinks(const char** parameters, int pcnt, userrec* user)
3924         {
3925                 ShowLinks(Utils->TreeRoot,user,0);
3926                 user->WriteServ("365 %s * :End of /LINKS list.",user->nick);
3927                 return;
3928         }
3929
3930         void HandleLusers(const char** parameters, int pcnt, userrec* user)
3931         {
3932                 unsigned int n_users = ServerInstance->UserCount();
3933
3934                 /* Only update these when someone wants to see them, more efficient */
3935                 if ((unsigned int)ServerInstance->LocalUserCount() > max_local)
3936                         max_local = ServerInstance->LocalUserCount();
3937                 if (n_users > max_global)
3938                         max_global = n_users;
3939
3940                 user->WriteServ("251 %s :There are %d users and %d invisible on %d servers",user->nick,n_users-ServerInstance->InvisibleUserCount(),ServerInstance->InvisibleUserCount(),this->CountServs());
3941                 if (ServerInstance->OperCount())
3942                         user->WriteServ("252 %s %d :operator(s) online",user->nick,ServerInstance->OperCount());
3943                 if (ServerInstance->UnregisteredUserCount())
3944                         user->WriteServ("253 %s %d :unknown connections",user->nick,ServerInstance->UnregisteredUserCount());
3945                 if (ServerInstance->ChannelCount())
3946                         user->WriteServ("254 %s %d :channels formed",user->nick,ServerInstance->ChannelCount());
3947                 user->WriteServ("254 %s :I have %d clients and %d servers",user->nick,ServerInstance->LocalUserCount(),this->CountLocalServs());
3948                 user->WriteServ("265 %s :Current Local Users: %d  Max: %d",user->nick,ServerInstance->LocalUserCount(),max_local);
3949                 user->WriteServ("266 %s :Current Global Users: %d  Max: %d",user->nick,n_users,max_global);
3950                 return;
3951         }
3952
3953         // WARNING: NOT THREAD SAFE - DONT GET ANY SMART IDEAS.
3954
3955         void ShowMap(TreeServer* Current, userrec* user, int depth, char matrix[128][80], float &totusers, float &totservers)
3956         {
3957                 if (line < 128)
3958                 {
3959                         for (int t = 0; t < depth; t++)
3960                         {
3961                                 matrix[line][t] = ' ';
3962                         }
3963
3964                         // For Aligning, we need to work out exactly how deep this thing is, and produce
3965                         // a 'Spacer' String to compensate.
3966                         char spacer[40];
3967
3968                         memset(spacer,' ',40);
3969                         if ((40 - Current->GetName().length() - depth) > 1) {
3970                                 spacer[40 - Current->GetName().length() - depth] = '\0';
3971                         }
3972                         else
3973                         {
3974                                 spacer[5] = '\0';
3975                         }
3976
3977                         float percent;
3978                         char text[80];
3979                         if (ServerInstance->clientlist.size() == 0) {
3980                                 // If there are no users, WHO THE HELL DID THE /MAP?!?!?!
3981                                 percent = 0;
3982                         }
3983                         else
3984                         {
3985                                 percent = ((float)Current->GetUserCount() / (float)ServerInstance->clientlist.size()) * 100;
3986                         }
3987                         snprintf(text, 80, "%s %s%5d [%5.2f%%]", Current->GetName().c_str(), spacer, Current->GetUserCount(), percent);
3988                         totusers += Current->GetUserCount();
3989                         totservers++;
3990                         strlcpy(&matrix[line][depth],text,80);
3991                         line++;
3992                         for (unsigned int q = 0; q < Current->ChildCount(); q++)
3993                         {
3994                                 if ((Utils->HideULines) && (ServerInstance->ULine(Current->GetChild(q)->GetName().c_str())))
3995                                 {
3996                                         if (*user->oper)
3997                                         {
3998                                                 ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
3999                                         }
4000                                 }
4001                                 else
4002                                 {
4003                                         ShowMap(Current->GetChild(q),user,(Utils->FlatLinks && (!*user->oper)) ? depth : depth+2,matrix,totusers,totservers);
4004                                 }
4005                         }
4006                 }
4007         }
4008
4009         int HandleMotd(const char** parameters, int pcnt, userrec* user)
4010         {
4011                 if (pcnt > 0)
4012                 {
4013                         /* Remote MOTD, the server is within the 1st parameter */
4014                         std::deque<std::string> params;
4015                         params.push_back(parameters[0]);
4016
4017                         /* Send it out remotely, generate no reply yet */
4018                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4019                         if (s)
4020                         {
4021                                 Utils->DoOneToOne(user->nick, "MOTD", params, s->GetName());
4022                         }
4023                         else
4024                         {
4025                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4026                         }
4027                         return 1;
4028                 }
4029                 return 0;
4030         }
4031
4032         int HandleAdmin(const char** parameters, int pcnt, userrec* user)
4033         {
4034                 if (pcnt > 0)
4035                 {
4036                         /* Remote ADMIN, the server is within the 1st parameter */
4037                         std::deque<std::string> params;
4038                         params.push_back(parameters[0]);
4039
4040                         /* Send it out remotely, generate no reply yet */
4041                         TreeServer* s = Utils->FindServerMask(parameters[0]);
4042                         if (s)
4043                         {
4044                                 Utils->DoOneToOne(user->nick, "ADMIN", params, s->GetName());
4045                         }
4046                         else
4047                         {
4048                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4049                         }
4050                         return 1;
4051                 }
4052                 return 0;
4053         }
4054
4055         int HandleStats(const char** parameters, int pcnt, userrec* user)
4056         {
4057                 if (pcnt > 1)
4058                 {
4059                         /* Remote STATS, the server is within the 2nd parameter */
4060                         std::deque<std::string> params;
4061                         params.push_back(parameters[0]);
4062                         params.push_back(parameters[1]);
4063                         /* Send it out remotely, generate no reply yet */
4064                         TreeServer* s = Utils->FindServerMask(parameters[1]);
4065                         if (s)
4066                         {
4067                                 params[1] = s->GetName();
4068                                 Utils->DoOneToOne(user->nick, "STATS", params, s->GetName());
4069                         }
4070                         else
4071                         {
4072                                 user->WriteServ( "402 %s %s :No such server", user->nick, parameters[0]);
4073                         }
4074                         return 1;
4075                 }
4076                 return 0;
4077         }
4078
4079         // Ok, prepare to be confused.
4080         // After much mulling over how to approach this, it struck me that
4081         // the 'usual' way of doing a /MAP isnt the best way. Instead of
4082         // keeping track of a ton of ascii characters, and line by line
4083         // under recursion working out where to place them using multiplications
4084         // and divisons, we instead render the map onto a backplane of characters
4085         // (a character matrix), then draw the branches as a series of "L" shapes
4086         // from the nodes. This is not only friendlier on CPU it uses less stack.
4087
4088         void HandleMap(const char** parameters, int pcnt, userrec* user)
4089         {
4090                 // This array represents a virtual screen which we will
4091                 // "scratch" draw to, as the console device of an irc
4092                 // client does not provide for a proper terminal.
4093                 float totusers = 0;
4094                 float totservers = 0;
4095                 char matrix[128][80];
4096                 for (unsigned int t = 0; t < 128; t++)
4097                 {
4098                         matrix[t][0] = '\0';
4099                 }
4100                 line = 0;
4101                 // The only recursive bit is called here.
4102                 ShowMap(Utils->TreeRoot,user,0,matrix,totusers,totservers);
4103                 // Process each line one by one. The algorithm has a limit of
4104                 // 128 servers (which is far more than a spanning tree should have
4105                 // anyway, so we're ok). This limit can be raised simply by making
4106                 // the character matrix deeper, 128 rows taking 10k of memory.
4107                 for (int l = 1; l < line; l++)
4108                 {
4109                         // scan across the line looking for the start of the
4110                         // servername (the recursive part of the algorithm has placed
4111                         // the servers at indented positions depending on what they
4112                         // are related to)
4113                         int first_nonspace = 0;
4114                         while (matrix[l][first_nonspace] == ' ')
4115                         {
4116                                 first_nonspace++;
4117                         }
4118                         first_nonspace--;
4119                         // Draw the `- (corner) section: this may be overwritten by
4120                         // another L shape passing along the same vertical pane, becoming
4121                         // a |- (branch) section instead.
4122                         matrix[l][first_nonspace] = '-';
4123                         matrix[l][first_nonspace-1] = '`';
4124                         int l2 = l - 1;
4125                         // Draw upwards until we hit the parent server, causing possibly
4126                         // other corners (`-) to become branches (|-)
4127                         while ((matrix[l2][first_nonspace-1] == ' ') || (matrix[l2][first_nonspace-1] == '`'))
4128                         {
4129                                 matrix[l2][first_nonspace-1] = '|';
4130                                 l2--;
4131                         }
4132                 }
4133                 // dump the whole lot to the user. This is the easy bit, honest.
4134                 for (int t = 0; t < line; t++)
4135                 {
4136                         user->WriteServ("006 %s :%s",user->nick,&matrix[t][0]);
4137                 }
4138                 float avg_users = totusers / totservers;
4139                 user->WriteServ("270 %s :%.0f server%s and %.0f user%s, average %.2f users per server",user->nick,totservers,(totservers > 1 ? "s" : ""),totusers,(totusers > 1 ? "s" : ""),avg_users);
4140         user->WriteServ("007 %s :End of /MAP",user->nick);
4141                 return;
4142         }
4143
4144         int HandleSquit(const char** parameters, int pcnt, userrec* user)
4145         {
4146                 TreeServer* s = Utils->FindServerMask(parameters[0]);
4147                 if (s)
4148                 {
4149                         if (s == Utils->TreeRoot)
4150                         {
4151                                  user->WriteServ("NOTICE %s :*** SQUIT: Foolish mortal, you cannot make a server SQUIT itself! (%s matches local server name)",user->nick,parameters[0]);
4152                                 return 1;
4153                         }
4154                         TreeSocket* sock = s->GetSocket();
4155                         if (sock)
4156                         {
4157                                 ServerInstance->Log(DEBUG,"Splitting server %s",s->GetName().c_str());
4158                                 ServerInstance->SNO->WriteToSnoMask('l',"SQUIT: Server \002%s\002 removed from network by %s",parameters[0],user->nick);
4159                                 sock->Squit(s,"Server quit by "+std::string(user->nick)+"!"+std::string(user->ident)+"@"+std::string(user->host));
4160                                 ServerInstance->SE->DelFd(sock);
4161                                 sock->Close();
4162                                 delete sock;
4163                         }
4164                         else
4165                         {
4166                                 user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 is not directly connected.",user->nick,parameters[0]);
4167                         }
4168                 }
4169                 else
4170                 {
4171                          user->WriteServ("NOTICE %s :*** SQUIT: The server \002%s\002 does not exist on the network.",user->nick,parameters[0]);
4172                 }
4173                 return 1;
4174         }
4175
4176         int HandleTime(const char** parameters, int pcnt, userrec* user)
4177         {
4178                 if ((IS_LOCAL(user)) && (pcnt))
4179                 {
4180                         TreeServer* found = Utils->FindServerMask(parameters[0]);
4181                         if (found)
4182                         {
4183                                 // we dont' override for local server
4184                                 if (found == Utils->TreeRoot)
4185                                         return 0;
4186
4187                                 std::deque<std::string> params;
4188                                 params.push_back(found->GetName());
4189                                 params.push_back(user->nick);
4190                                 Utils->DoOneToOne(ServerInstance->Config->ServerName,"TIME",params,found->GetName());
4191                         }
4192                         else
4193                         {
4194                                 user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4195                         }
4196                 }
4197                 return 1;
4198         }
4199
4200         int HandleRemoteWhois(const char** parameters, int pcnt, userrec* user)
4201         {
4202                 if ((IS_LOCAL(user)) && (pcnt > 1))
4203                 {
4204                         userrec* remote = ServerInstance->FindNick(parameters[1]);
4205                         if ((remote) && (remote->GetFd() < 0))
4206                         {
4207                                 std::deque<std::string> params;
4208                                 params.push_back(parameters[1]);
4209                                 Utils->DoOneToOne(user->nick,"IDLE",params,remote->server);
4210                                 return 1;
4211                         }
4212                         else if (!remote)
4213                         {
4214                                 user->WriteServ("401 %s %s :No such nick/channel",user->nick, parameters[1]);
4215                                 user->WriteServ("318 %s %s :End of /WHOIS list.",user->nick, parameters[1]);
4216                                 return 1;
4217                         }
4218                 }
4219                 return 0;
4220         }
4221
4222         void DoPingChecks(time_t curtime)
4223         {
4224                 for (unsigned int j = 0; j < Utils->TreeRoot->ChildCount(); j++)
4225                 {
4226                         TreeServer* serv = Utils->TreeRoot->GetChild(j);
4227                         TreeSocket* sock = serv->GetSocket();
4228                         if (sock)
4229                         {
4230                                 if (curtime >= serv->NextPingTime())
4231                                 {
4232                                         if (serv->AnsweredLastPing())
4233                                         {
4234                                                 sock->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" PING "+serv->GetName());
4235                                                 serv->SetNextPingTime(curtime + 60);
4236                                         }
4237                                         else
4238                                         {
4239                                                 // they didnt answer, boot them
4240                                                 ServerInstance->SNO->WriteToSnoMask('l',"Server \002%s\002 pinged out",serv->GetName().c_str());
4241                                                 sock->Squit(serv,"Ping timeout");
4242                                                 ServerInstance->SE->DelFd(sock);
4243                                                 sock->Close();
4244                                                 delete sock;
4245                                                 return;
4246                                         }
4247                                 }
4248                         }
4249                 }
4250         }
4251
4252         void ConnectServer(Link* x)
4253         {
4254                 insp_inaddr binip;
4255
4256                 /* Do we already have an IP? If so, no need to resolve it. */
4257                 if (insp_aton(x->IPAddr.c_str(), &binip) > 0)
4258                 {
4259                         TreeSocket* newsocket = new TreeSocket(Utils, ServerInstance, x->IPAddr,x->Port,false,10,x->Name.c_str());
4260                         if (newsocket->GetFd() > -1)
4261                         {
4262                                 /* Handled automatically on success */
4263                         }
4264                         else
4265                         {
4266                                 ServerInstance->SNO->WriteToSnoMask('l',"CONNECT: Error connecting \002%s\002: %s.",x->Name.c_str(),strerror(errno));
4267                                 delete newsocket;
4268                                 Utils->DoFailOver(x);
4269                         }
4270                 }
4271                 else
4272                 {
4273                         try
4274                         {
4275                                 ServernameResolver* snr = new ServernameResolver(Utils, ServerInstance,x->IPAddr, *x);
4276                                 ServerInstance->AddResolver(snr);
4277                         }
4278                         catch (ModuleException& e)
4279                         {
4280                                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
4281                                 Utils->DoFailOver(x);
4282                         }
4283                 }
4284         }
4285
4286         void AutoConnectServers(time_t curtime)
4287         {
4288                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4289                 {
4290                         if ((x->AutoConnect) && (curtime >= x->NextConnectTime))
4291                         {
4292                                 ServerInstance->Log(DEBUG,"Auto-Connecting %s",x->Name.c_str());
4293                                 x->NextConnectTime = curtime + x->AutoConnect;
4294                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4295                                 if (x->FailOver.length())
4296                                 {
4297                                         TreeServer* CheckFailOver = Utils->FindServer(x->FailOver.c_str());
4298                                         if (CheckFailOver)
4299                                         {
4300                                                 /* The failover for this server is currently a member of the network.
4301                                                  * The failover probably succeeded, where the main link did not.
4302                                                  * Don't try the main link until the failover is gone again.
4303                                                  */
4304                                                 continue;
4305                                         }
4306                                 }
4307                                 if (!CheckDupe)
4308                                 {
4309                                         // an autoconnected server is not connected. Check if its time to connect it
4310                                         ServerInstance->SNO->WriteToSnoMask('l',"AUTOCONNECT: Auto-connecting server \002%s\002 (%lu seconds until next attempt)",x->Name.c_str(),x->AutoConnect);
4311                                         this->ConnectServer(&(*x));
4312                                 }
4313                         }
4314                 }
4315         }
4316
4317         int HandleVersion(const char** parameters, int pcnt, userrec* user)
4318         {
4319                 // we've already checked if pcnt > 0, so this is safe
4320                 TreeServer* found = Utils->FindServerMask(parameters[0]);
4321                 if (found)
4322                 {
4323                         std::string Version = found->GetVersion();
4324                         user->WriteServ("351 %s :%s",user->nick,Version.c_str());
4325                         if (found == Utils->TreeRoot)
4326                         {
4327                                 std::stringstream out(ServerInstance->Config->data005);
4328                                 std::string token = "";
4329                                 std::string line5 = "";
4330                                 int token_counter = 0;
4331
4332                                 while (!out.eof())
4333                                 {
4334                                         out >> token;
4335                                         line5 = line5 + token + " ";
4336                                         token_counter++;
4337
4338                                         if ((token_counter >= 13) || (out.eof() == true))
4339                                         {
4340                                                 user->WriteServ("005 %s %s:are supported by this server",user->nick,line5.c_str());
4341                                                 line5 = "";
4342                                                 token_counter = 0;
4343                                         }
4344                                 }
4345                         }
4346                 }
4347                 else
4348                 {
4349                         user->WriteServ("402 %s %s :No such server",user->nick,parameters[0]);
4350                 }
4351                 return 1;
4352         }
4353
4354         int HandleConnect(const char** parameters, int pcnt, userrec* user)
4355         {
4356                 for (std::vector<Link>::iterator x = Utils->LinkBlocks.begin(); x < Utils->LinkBlocks.end(); x++)
4357                 {
4358                         if (ServerInstance->MatchText(x->Name.c_str(),parameters[0]))
4359                         {
4360                                 TreeServer* CheckDupe = Utils->FindServer(x->Name.c_str());
4361                                 if (!CheckDupe)
4362                                 {
4363                                         user->WriteServ("NOTICE %s :*** CONNECT: Connecting to server: \002%s\002 (%s:%d)",user->nick,x->Name.c_str(),(x->HiddenFromStats ? "<hidden>" : x->IPAddr.c_str()),x->Port);
4364                                         ConnectServer(&(*x));
4365                                         return 1;
4366                                 }
4367                                 else
4368                                 {
4369                                         user->WriteServ("NOTICE %s :*** CONNECT: Server \002%s\002 already exists on the network and is connected via \002%s\002",user->nick,x->Name.c_str(),CheckDupe->GetParent()->GetName().c_str());
4370                                         return 1;
4371                                 }
4372                         }
4373                 }
4374                 user->WriteServ("NOTICE %s :*** CONNECT: No server matching \002%s\002 could be found in the config file.",user->nick,parameters[0]);
4375                 return 1;
4376         }
4377
4378         virtual int OnStats(char statschar, userrec* user, string_list &results)
4379         {
4380                 if (statschar == 'c')
4381                 {
4382                         for (unsigned int i = 0; i < Utils->LinkBlocks.size(); i++)
4383                         {
4384                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 213 "+user->nick+" C *@"+(Utils->LinkBlocks[i].HiddenFromStats ? "<hidden>" : Utils->LinkBlocks[i].IPAddr)+" * "+Utils->LinkBlocks[i].Name.c_str()+" "+ConvToStr(Utils->LinkBlocks[i].Port)+" "+(Utils->LinkBlocks[i].EncryptionKey != "" ? 'e' : '-')+(Utils->LinkBlocks[i].AutoConnect ? 'a' : '-')+'s');
4385                                 results.push_back(std::string(ServerInstance->Config->ServerName)+" 244 "+user->nick+" H * * "+Utils->LinkBlocks[i].Name.c_str());
4386                         }
4387                         results.push_back(std::string(ServerInstance->Config->ServerName)+" 219 "+user->nick+" "+statschar+" :End of /STATS report");
4388                         ServerInstance->SNO->WriteToSnoMask('t',"Notice: %s '%c' requested by %s (%s@%s)",(!strcmp(user->server,ServerInstance->Config->ServerName) ? "Stats" : "Remote stats"),statschar,user->nick,user->ident,user->host);
4389                         return 1;
4390                 }
4391                 return 0;
4392         }
4393
4394         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
4395         {
4396                 /* If the command doesnt appear to be valid, we dont want to mess with it. */
4397                 if (!validated)
4398                         return 0;
4399
4400                 if (command == "CONNECT")
4401                 {
4402                         return this->HandleConnect(parameters,pcnt,user);
4403                 }
4404                 else if (command == "STATS")
4405                 {
4406                         return this->HandleStats(parameters,pcnt,user);
4407                 }
4408                 else if (command == "MOTD")
4409                 {
4410                         return this->HandleMotd(parameters,pcnt,user);
4411                 }
4412                 else if (command == "ADMIN")
4413                 {
4414                         return this->HandleAdmin(parameters,pcnt,user);
4415                 }
4416                 else if (command == "SQUIT")
4417                 {
4418                         return this->HandleSquit(parameters,pcnt,user);
4419                 }
4420                 else if (command == "MAP")
4421                 {
4422                         this->HandleMap(parameters,pcnt,user);
4423                         return 1;
4424                 }
4425                 else if ((command == "TIME") && (pcnt > 0))
4426                 {
4427                         return this->HandleTime(parameters,pcnt,user);
4428                 }
4429                 else if (command == "LUSERS")
4430                 {
4431                         this->HandleLusers(parameters,pcnt,user);
4432                         return 1;
4433                 }
4434                 else if (command == "LINKS")
4435                 {
4436                         this->HandleLinks(parameters,pcnt,user);
4437                         return 1;
4438                 }
4439                 else if (command == "WHOIS")
4440                 {
4441                         if (pcnt > 1)
4442                         {
4443                                 // remote whois
4444                                 return this->HandleRemoteWhois(parameters,pcnt,user);
4445                         }
4446                 }
4447                 else if ((command == "VERSION") && (pcnt > 0))
4448                 {
4449                         this->HandleVersion(parameters,pcnt,user);
4450                         return 1;
4451                 }
4452
4453                 return 0;
4454         }
4455
4456         virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line)
4457         {
4458                 if ((result == CMD_SUCCESS) && (ServerInstance->IsValidModuleCommand(command, pcnt, user)))
4459                 {
4460                         // this bit of code cleverly routes all module commands
4461                         // to all remote severs *automatically* so that modules
4462                         // can just handle commands locally, without having
4463                         // to have any special provision in place for remote
4464                         // commands and linking protocols.
4465                         std::deque<std::string> params;
4466                         params.clear();
4467                         for (int j = 0; j < pcnt; j++)
4468                         {
4469                                 if (strchr(parameters[j],' '))
4470                                 {
4471                                         params.push_back(":" + std::string(parameters[j]));
4472                                 }
4473                                 else
4474                                 {
4475                                         params.push_back(std::string(parameters[j]));
4476                                 }
4477                         }
4478                         ServerInstance->Log(DEBUG,"Globally route '%s'",command.c_str());
4479                         Utils->DoOneToMany(user->nick,command,params);
4480                 }
4481         }
4482
4483         virtual void OnGetServerDescription(const std::string &servername,std::string &description)
4484         {
4485                 TreeServer* s = Utils->FindServer(servername);
4486                 if (s)
4487                 {
4488                         description = s->GetDesc();
4489                 }
4490         }
4491
4492         virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel)
4493         {
4494                 if (IS_LOCAL(source))
4495                 {
4496                         std::deque<std::string> params;
4497                         params.push_back(dest->nick);
4498                         params.push_back(channel->name);
4499                         Utils->DoOneToMany(source->nick,"INVITE",params);
4500                 }
4501         }
4502
4503         virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic)
4504         {
4505                 std::deque<std::string> params;
4506                 params.push_back(chan->name);
4507                 params.push_back(":"+topic);
4508                 Utils->DoOneToMany(user->nick,"TOPIC",params);
4509         }
4510
4511         virtual void OnWallops(userrec* user, const std::string &text)
4512         {
4513                 if (IS_LOCAL(user))
4514                 {
4515                         std::deque<std::string> params;
4516                         params.push_back(":"+text);
4517                         Utils->DoOneToMany(user->nick,"WALLOPS",params);
4518                 }
4519         }
4520
4521         virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status)
4522         {
4523                 if (target_type == TYPE_USER)
4524                 {
4525                         userrec* d = (userrec*)dest;
4526                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4527                         {
4528                                 std::deque<std::string> params;
4529                                 params.clear();
4530                                 params.push_back(d->nick);
4531                                 params.push_back(":"+text);
4532                                 Utils->DoOneToOne(user->nick,"NOTICE",params,d->server);
4533                         }
4534                 }
4535                 else if (target_type == TYPE_CHANNEL)
4536                 {
4537                         if (IS_LOCAL(user))
4538                         {
4539                                 chanrec *c = (chanrec*)dest;
4540                                 if (c)
4541                                 {
4542                                         std::string cname = c->name;
4543                                         if (status)
4544                                                 cname = status + cname;
4545                                         std::deque<TreeServer*> list;
4546                                         Utils->GetListOfServersForChannel(c,list);
4547                                         unsigned int ucount = list.size();
4548                                         for (unsigned int i = 0; i < ucount; i++)
4549                                         {
4550                                                 TreeSocket* Sock = list[i]->GetSocket();
4551                                                 if (Sock)
4552                                                         Sock->WriteLine(":"+std::string(user->nick)+" NOTICE "+cname+" :"+text);
4553                                         }
4554                                 }
4555                         }
4556                 }
4557                 else if (target_type == TYPE_SERVER)
4558                 {
4559                         if (IS_LOCAL(user))
4560                         {
4561                                 char* target = (char*)dest;
4562                                 std::deque<std::string> par;
4563                                 par.push_back(target);
4564                                 par.push_back(":"+text);
4565                                 Utils->DoOneToMany(user->nick,"NOTICE",par);
4566                         }
4567                 }
4568         }
4569
4570         virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status)
4571         {
4572                 if (target_type == TYPE_USER)
4573                 {
4574                         // route private messages which are targetted at clients only to the server
4575                         // which needs to receive them
4576                         userrec* d = (userrec*)dest;
4577                         if ((d->GetFd() < 0) && (IS_LOCAL(user)))
4578                         {
4579                                 std::deque<std::string> params;
4580                                 params.clear();
4581                                 params.push_back(d->nick);
4582                                 params.push_back(":"+text);
4583                                 Utils->DoOneToOne(user->nick,"PRIVMSG",params,d->server);
4584                         }
4585                 }
4586                 else if (target_type == TYPE_CHANNEL)
4587                 {
4588                         if (IS_LOCAL(user))
4589                         {
4590                                 chanrec *c = (chanrec*)dest;
4591                                 if (c)
4592                                 {
4593                                         std::string cname = c->name;
4594                                         if (status)
4595                                                 cname = status + cname;
4596                                         std::deque<TreeServer*> list;
4597                                         Utils->GetListOfServersForChannel(c,list);
4598                                         unsigned int ucount = list.size();
4599                                         for (unsigned int i = 0; i < ucount; i++)
4600                                         {
4601                                                 TreeSocket* Sock = list[i]->GetSocket();
4602                                                 if (Sock)
4603                                                         Sock->WriteLine(":"+std::string(user->nick)+" PRIVMSG "+cname+" :"+text);
4604                                         }
4605                                 }
4606                         }
4607                 }
4608                 else if (target_type == TYPE_SERVER)
4609                 {
4610                         if (IS_LOCAL(user))
4611                         {
4612                                 char* target = (char*)dest;
4613                                 std::deque<std::string> par;
4614                                 par.push_back(target);
4615                                 par.push_back(":"+text);
4616                                 Utils->DoOneToMany(user->nick,"PRIVMSG",par);
4617                         }
4618                 }
4619         }
4620
4621         virtual void OnBackgroundTimer(time_t curtime)
4622         {
4623                 AutoConnectServers(curtime);
4624                 DoPingChecks(curtime);
4625         }
4626
4627         virtual void OnUserJoin(userrec* user, chanrec* channel)
4628         {
4629                 // Only do this for local users
4630                 if (IS_LOCAL(user))
4631                 {
4632                         std::deque<std::string> params;
4633                         params.clear();
4634                         params.push_back(channel->name);
4635                         // set up their permissions and the channel TS with FJOIN.
4636                         // All users are FJOINed now, because a module may specify
4637                         // new joining permissions for the user.
4638                         params.clear();
4639                         params.push_back(channel->name);
4640                         params.push_back(ConvToStr(channel->age));
4641                         params.push_back(std::string(channel->GetAllPrefixChars(user))+","+std::string(user->nick));
4642                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FJOIN",params);
4643                 }
4644         }
4645
4646         virtual void OnChangeHost(userrec* user, const std::string &newhost)
4647         {
4648                 // only occurs for local clients
4649                 if (user->registered != REG_ALL)
4650                         return;
4651                 std::deque<std::string> params;
4652                 params.push_back(newhost);
4653                 Utils->DoOneToMany(user->nick,"FHOST",params);
4654         }
4655
4656         virtual void OnChangeName(userrec* user, const std::string &gecos)
4657         {
4658                 // only occurs for local clients
4659                 if (user->registered != REG_ALL)
4660                         return;
4661                 std::deque<std::string> params;
4662                 params.push_back(gecos);
4663                 Utils->DoOneToMany(user->nick,"FNAME",params);
4664         }
4665
4666         virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage)
4667         {
4668                 if (IS_LOCAL(user))
4669                 {
4670                         std::deque<std::string> params;
4671                         params.push_back(channel->name);
4672                         if (partmessage != "")
4673                                 params.push_back(":"+partmessage);
4674                         Utils->DoOneToMany(user->nick,"PART",params);
4675                 }
4676         }
4677
4678         virtual void OnUserConnect(userrec* user)
4679         {
4680                 char agestr[MAXBUF];
4681                 if (IS_LOCAL(user))
4682                 {
4683                         std::deque<std::string> params;
4684                         snprintf(agestr,MAXBUF,"%lu",(unsigned long)user->age);
4685                         params.push_back(agestr);
4686                         params.push_back(user->nick);
4687                         params.push_back(user->host);
4688                         params.push_back(user->dhost);
4689                         params.push_back(user->ident);
4690                         params.push_back("+"+std::string(user->FormatModes()));
4691                         params.push_back(user->GetIPString());
4692                         params.push_back(":"+std::string(user->fullname));
4693                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"NICK",params);
4694
4695                         // User is Local, change needs to be reflected!
4696                         TreeServer* SourceServer = Utils->FindServer(user->server);
4697                         if (SourceServer)
4698                         {
4699                                 SourceServer->AddUserCount();
4700                         }
4701
4702                 }
4703         }
4704
4705         virtual void OnUserQuit(userrec* user, const std::string &reason)
4706         {
4707                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4708                 {
4709                         std::deque<std::string> params;
4710                         params.push_back(":"+reason);
4711                         Utils->DoOneToMany(user->nick,"QUIT",params);
4712                 }
4713                 // Regardless, We need to modify the user Counts..
4714                 TreeServer* SourceServer = Utils->FindServer(user->server);
4715                 if (SourceServer)
4716                 {
4717                         SourceServer->DelUserCount();
4718                 }
4719
4720         }
4721
4722         virtual void OnUserPostNick(userrec* user, const std::string &oldnick)
4723         {
4724                 if (IS_LOCAL(user))
4725                 {
4726                         std::deque<std::string> params;
4727                         params.push_back(user->nick);
4728                         Utils->DoOneToMany(oldnick,"NICK",params);
4729                 }
4730         }
4731
4732         virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason)
4733         {
4734                 if ((source) && (IS_LOCAL(source)))
4735                 {
4736                         std::deque<std::string> params;
4737                         params.push_back(chan->name);
4738                         params.push_back(user->nick);
4739                         params.push_back(":"+reason);
4740                         Utils->DoOneToMany(source->nick,"KICK",params);
4741                 }
4742                 else if (!source)
4743                 {
4744                         std::deque<std::string> params;
4745                         params.push_back(chan->name);
4746                         params.push_back(user->nick);
4747                         params.push_back(":"+reason);
4748                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"KICK",params);
4749                 }
4750         }
4751
4752         virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason)
4753         {
4754                 std::deque<std::string> params;
4755                 params.push_back(dest->nick);
4756                 params.push_back(":"+reason);
4757                 Utils->DoOneToMany(source->nick,"KILL",params);
4758         }
4759
4760         virtual void OnRehash(const std::string &parameter)
4761         {
4762                 if (parameter != "")
4763                 {
4764                         std::deque<std::string> params;
4765                         params.push_back(parameter);
4766                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"REHASH",params);
4767                         // check for self
4768                         if (ServerInstance->MatchText(ServerInstance->Config->ServerName,parameter))
4769                         {
4770                                 ServerInstance->WriteOpers("*** Remote rehash initiated from server \002%s\002",ServerInstance->Config->ServerName);
4771                                 ServerInstance->RehashServer();
4772                         }
4773                 }
4774                 Utils->ReadConfiguration(false);
4775         }
4776
4777         // note: the protocol does not allow direct umode +o except
4778         // via NICK with 8 params. sending OPERTYPE infers +o modechange
4779         // locally.
4780         virtual void OnOper(userrec* user, const std::string &opertype)
4781         {
4782                 if (IS_LOCAL(user))
4783                 {
4784                         std::deque<std::string> params;
4785                         params.push_back(opertype);
4786                         Utils->DoOneToMany(user->nick,"OPERTYPE",params);
4787                 }
4788         }
4789
4790         void OnLine(userrec* source, const std::string &host, bool adding, char linetype, long duration, const std::string &reason)
4791         {
4792                 if (IS_LOCAL(source))
4793                 {
4794                         char type[8];
4795                         snprintf(type,8,"%cLINE",linetype);
4796                         std::string stype = type;
4797                         if (adding)
4798                         {
4799                                 char sduration[MAXBUF];
4800                                 snprintf(sduration,MAXBUF,"%ld",duration);
4801                                 std::deque<std::string> params;
4802                                 params.push_back(host);
4803                                 params.push_back(sduration);
4804                                 params.push_back(":"+reason);
4805                                 Utils->DoOneToMany(source->nick,stype,params);
4806                         }
4807                         else
4808                         {
4809                                 std::deque<std::string> params;
4810                                 params.push_back(host);
4811                                 Utils->DoOneToMany(source->nick,stype,params);
4812                         }
4813                 }
4814         }
4815
4816         virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4817         {
4818                 OnLine(source,hostmask,true,'G',duration,reason);
4819         }
4820
4821         virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask)
4822         {
4823                 OnLine(source,ipmask,true,'Z',duration,reason);
4824         }
4825
4826         virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask)
4827         {
4828                 OnLine(source,nickmask,true,'Q',duration,reason);
4829         }
4830
4831         virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask)
4832         {
4833                 OnLine(source,hostmask,true,'E',duration,reason);
4834         }
4835
4836         virtual void OnDelGLine(userrec* source, const std::string &hostmask)
4837         {
4838                 OnLine(source,hostmask,false,'G',0,"");
4839         }
4840
4841         virtual void OnDelZLine(userrec* source, const std::string &ipmask)
4842         {
4843                 OnLine(source,ipmask,false,'Z',0,"");
4844         }
4845
4846         virtual void OnDelQLine(userrec* source, const std::string &nickmask)
4847         {
4848                 OnLine(source,nickmask,false,'Q',0,"");
4849         }
4850
4851         virtual void OnDelELine(userrec* source, const std::string &hostmask)
4852         {
4853                 OnLine(source,hostmask,false,'E',0,"");
4854         }
4855
4856         virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text)
4857         {
4858                 if ((IS_LOCAL(user)) && (user->registered == REG_ALL))
4859                 {
4860                         if (target_type == TYPE_USER)
4861                         {
4862                                 userrec* u = (userrec*)dest;
4863                                 std::deque<std::string> params;
4864                                 params.push_back(u->nick);
4865                                 params.push_back(text);
4866                                 Utils->DoOneToMany(user->nick,"MODE",params);
4867                         }
4868                         else
4869                         {
4870                                 chanrec* c = (chanrec*)dest;
4871                                 std::deque<std::string> params;
4872                                 params.push_back(c->name);
4873                                 params.push_back(text);
4874                                 Utils->DoOneToMany(user->nick,"MODE",params);
4875                         }
4876                 }
4877         }
4878
4879         virtual void OnSetAway(userrec* user)
4880         {
4881                 if (IS_LOCAL(user))
4882                 {
4883                         std::deque<std::string> params;
4884                         params.push_back(":"+std::string(user->awaymsg));
4885                         Utils->DoOneToMany(user->nick,"AWAY",params);
4886                 }
4887         }
4888
4889         virtual void OnCancelAway(userrec* user)
4890         {
4891                 if (IS_LOCAL(user))
4892                 {
4893                         std::deque<std::string> params;
4894                         params.clear();
4895                         Utils->DoOneToMany(user->nick,"AWAY",params);
4896                 }
4897         }
4898
4899         virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline)
4900         {
4901                 TreeSocket* s = (TreeSocket*)opaque;
4902                 if (target)
4903                 {
4904                         if (target_type == TYPE_USER)
4905                         {
4906                                 userrec* u = (userrec*)target;
4907                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+u->nick+" "+ConvToStr(u->age)+" "+modeline);
4908                         }
4909                         else
4910                         {
4911                                 chanrec* c = (chanrec*)target;
4912                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" FMODE "+c->name+" "+ConvToStr(c->age)+" "+modeline);
4913                         }
4914                 }
4915         }
4916
4917         virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata)
4918         {
4919                 TreeSocket* s = (TreeSocket*)opaque;
4920                 if (target)
4921                 {
4922                         if (target_type == TYPE_USER)
4923                         {
4924                                 userrec* u = (userrec*)target;
4925                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+u->nick+" "+extname+" :"+extdata);
4926                         }
4927                         else if (target_type == TYPE_OTHER)
4928                         {
4929                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA * "+extname+" :"+extdata);
4930                         }
4931                         else if (target_type == TYPE_CHANNEL)
4932                         {
4933                                 chanrec* c = (chanrec*)target;
4934                                 s->WriteLine(std::string(":")+ServerInstance->Config->ServerName+" METADATA "+c->name+" "+extname+" :"+extdata);
4935                         }
4936                 }
4937         }
4938
4939         virtual void OnEvent(Event* event)
4940         {
4941                 std::deque<std::string>* params = (std::deque<std::string>*)event->GetData();
4942
4943                 if (event->GetEventID() == "send_metadata")
4944                 {
4945                         if (params->size() < 3)
4946                                 return;
4947                         (*params)[2] = ":" + (*params)[2];
4948                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"METADATA",*params);
4949                 }
4950                 else if (event->GetEventID() == "send_topic")
4951                 {
4952                         if (params->size() < 2)
4953                                 return;
4954                         (*params)[1] = ":" + (*params)[1];
4955                         params->insert(params->begin() + 1,ServerInstance->Config->ServerName);
4956                         params->insert(params->begin() + 1,ConvToStr(ServerInstance->Time()));
4957                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FTOPIC",*params);
4958                 }
4959                 else if (event->GetEventID() == "send_mode")
4960                 {
4961                         if (params->size() < 2)
4962                                 return;
4963                         // Insert the TS value of the object, either userrec or chanrec
4964                         time_t ourTS = 0;
4965                         userrec* a = ServerInstance->FindNick((*params)[0]);
4966                         if (a)
4967                         {
4968                                 ourTS = a->age;
4969                         }
4970                         else
4971                         {
4972                                 chanrec* a = ServerInstance->FindChan((*params)[0]);
4973                                 if (a)
4974                                 {
4975                                         ourTS = a->age;
4976                                 }
4977                         }
4978                         params->insert(params->begin() + 1,ConvToStr(ourTS));
4979                         Utils->DoOneToMany(ServerInstance->Config->ServerName,"FMODE",*params);
4980                 }
4981         }
4982
4983         virtual ~ModuleSpanningTree()
4984         {
4985                 ServerInstance->Log(DEBUG,"Performing unload of spanningtree!");
4986                 /* This will also free the listeners */
4987                 delete Utils;
4988         }
4989
4990         virtual Version GetVersion()
4991         {
4992                 return Version(1,1,0,2,VF_VENDOR,API_VERSION);
4993         }
4994
4995         void Implements(char* List)
4996         {
4997                 List[I_OnPreCommand] = List[I_OnGetServerDescription] = List[I_OnUserInvite] = List[I_OnPostLocalTopicChange] = 1;
4998                 List[I_OnWallops] = List[I_OnUserNotice] = List[I_OnUserMessage] = List[I_OnBackgroundTimer] = 1;
4999                 List[I_OnUserJoin] = List[I_OnChangeHost] = List[I_OnChangeName] = List[I_OnUserPart] = List[I_OnUserConnect] = 1;
5000                 List[I_OnUserQuit] = List[I_OnUserPostNick] = List[I_OnUserKick] = List[I_OnRemoteKill] = List[I_OnRehash] = 1;
5001                 List[I_OnOper] = List[I_OnAddGLine] = List[I_OnAddZLine] = List[I_OnAddQLine] = List[I_OnAddELine] = 1;
5002                 List[I_OnDelGLine] = List[I_OnDelZLine] = List[I_OnDelQLine] = List[I_OnDelELine] = List[I_ProtoSendMode] = List[I_OnMode] = 1;
5003                 List[I_OnStats] = List[I_ProtoSendMetaData] = List[I_OnEvent] = List[I_OnSetAway] = List[I_OnCancelAway] = List[I_OnPostCommand] = 1;
5004         }
5005
5006         /* It is IMPORTANT that m_spanningtree is the last module in the chain
5007          * so that any activity it sees is FINAL, e.g. we arent going to send out
5008          * a NICK message before m_cloaking has finished putting the +x on the user,
5009          * etc etc.
5010          * Therefore, we return PRIORITY_LAST to make sure we end up at the END of
5011          * the module call queue.
5012          */
5013         Priority Prioritize()
5014         {
5015                 return PRIORITY_LAST;
5016         }
5017 };
5018
5019 void SpanningTreeUtilities::DoFailOver(Link* x)
5020 {
5021         if (x->FailOver.length())
5022         {
5023                 if (x->FailOver == x->Name)
5024                 {
5025                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Some muppet configured the failover for server \002%s\002 to point at itself. Not following it!", x->Name.c_str());
5026                         return;
5027                 }
5028                 Link* TryThisOne = this->FindLink(x->FailOver.c_str());
5029                 if (TryThisOne)
5030                 {
5031                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Trying failover link for \002%s\002: \002%s\002...", x->Name.c_str(), TryThisOne->Name.c_str());
5032                         Creator->ConnectServer(TryThisOne);
5033                 }
5034                 else
5035                 {
5036                         ServerInstance->SNO->WriteToSnoMask('l',"FAILOVER: Invalid failover server specified for server \002%s\002, will not follow!", x->Name.c_str());
5037                 }
5038         }
5039 }
5040
5041 Link* SpanningTreeUtilities::FindLink(const std::string& name)
5042 {
5043         for (std::vector<Link>::iterator x = LinkBlocks.begin(); x < LinkBlocks.end(); x++)
5044         {
5045                 if (ServerInstance->MatchText(x->Name.c_str(), name.c_str()))
5046                 {
5047                         return &(*x);
5048                 }
5049         }
5050         return NULL;
5051 }
5052
5053
5054 class ModuleSpanningTreeFactory : public ModuleFactory
5055 {
5056  public:
5057         ModuleSpanningTreeFactory()
5058         {
5059         }
5060
5061         ~ModuleSpanningTreeFactory()
5062         {
5063         }
5064
5065         virtual Module * CreateModule(InspIRCd* Me)
5066         {
5067                 return new ModuleSpanningTree(Me);
5068         }
5069
5070 };
5071
5072
5073 extern "C" void * init_module( void )
5074 {
5075         return new ModuleSpanningTreeFactory;
5076 }